SO

™

SELF-CLINCHING 

STANDOFFS

PEM® through hole threaded and 

unthreaded standoffs for mounting, 

spacing or stacking panels.

SO-2

    

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PennEngineering • 

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SO-3

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

 BSO

 

   • •

 BSOA

 

  

• 

•     

  •

 BSOS

 

 • 

• 

•     

  •

 BSO4

 

• 

(2)

 •  •

 DSO

 

          •      

 DSOS

 

 •     •     •

 SO

 

           •

 SOA

 

       • 

   •

 SOS

 

 •      • 

   •

 SO4

 

• 

(2)

         •

 SOAG

 

    •    

  •

 SOSG

  

• 

  •    

  •

 TSO

 

    • •

 

(3)

      •  •

 TSOA

 

    • •

 

(3)

      • • •

 TSOS

 

  •  • •

 

(3)

      • • •

 TSO4

 

• 

(2)

  • •

 

(3)

      •  •

SO/SOS/SOA/SO4

TSO/TSOS/TSOA/TSO4 (Styles 1 & 2)

SOSG/SOAG

PEM® self-clinching standoffs, which use the proven self-clinching design, provide 

ideal solutions for applications where mounting, spacing or stacking of panels, 

boards or components are required.  Pressed into round holes, these fasteners 

mount permanently into metal sheets as thin as .025” / 0.63 mm.

Specially designed SO4™, BSO4™ and TSO4™ standoffs are made from hardened 

stainless steel and are ideal for clinching into stainless steel sheets. An optional 

nickel plating is now available if product is expected to be used in a corrosive 

environment.

For more information on the proper use of PEM® self-clinching standoffs, check our 

website for Tech Sheet 

PEM® - REF/Standoff Basics

.

ME

TR

IC

U

NIF

IE

D

ME

TR

IC

U

NIF

IE

D

BLIND 

THREADS

THROUGH-HOLE 

THREADS

Support This 

sheet

  Min. 

Hole Size 

B

 Thread Sheet 

In Sheet 

Counter- 

C H 

Min. Dist. 

D

 Code 

Thickness 

+.003 

Bore Dia. 

+.000 Nom. Hole 

C/ 

±.010

   

  -.000 ±.005 -.005  To Edge

  440 .040 .166  .125  .165  .187  .23
  6440 .040  .213  .125  .212  .250  .27
  632 .040 .213 .156 .212 .250  .27
  8632 .050  .281  .156  .280  .312  .31
  832 .050 .281 .188 .280 .312  .31
  032 .050 .281 .203 .280  .312  .31

 

 

                                   Type

  Thread 

                       Fastener Material   Thread

  Size 

 Stainless      

Hardened 

Code

   Steel  Steel  Aluminum  Stainless Steel 

 

.125  .187 .250 .312  .375  .437 .500 .562  .625  .687 .750  .812  .875 .937  1.00  1.062

  .112-40 

SO 

SOS SOA 

SO4

 440 

4 6 8 10 12 14 16 18 20 22 24 – – – – –

  (#4-40)    

 

 

6440

(1)

  .138-32 

SO SOS  SOA 

SO4

 632 

4  6  8 10  12  14  16  18  20 22 24  26  28 30  32  34

  (#6-32)    

 

 

8632

(1)

  .164-32 

SO  SOS  SOA 

SO4 

832  4  6  8 10  12  14  16  18  20 22 24  26  28 30  32  34

  (#8-32)

  .190-32

 

SO  SOS  SOA 

SO4 

032  4  6  8 10  12  14  16  18  20 22 24  26  28 30  32  34

  (#10-32)
 

D Dimension ±.010

 

None .187  .312  .437

  Min.   B

 Thread Sheet 

Hole Size Counter-  C 

H  Min. Dist. 

D

 Code 

Thickness 

In Sheet  Bore Dia. 

-0.13 

Nom. 

Hole 

C/

 

±0.25

    +0.08 ±0.13   

  To Edge

  M3  1  4.22 3.2  4.2  4.8  6
 3.5M3 1  5.41 3.2 5.39 6.4 6.8
 M3.5  1  5.41  3.9 5.39  6.4  6.8
 M4 1.27 7.14 4.8 7.12  7.9  8
  M5  1.27 7.14 5.35 7.12  7.9  8

(1)  Standoffs with thread codes 6440, 8632, and 3.5M3 have a thicker wall to provide more bearing surface for the mating component or panel 

reducing the chance of cracking or cutting into the board.

Please contact your local PEM® distributor for availability, minimum quantity, and pricing information.

All dimensions are in millimeters.

GENERAL DIMENSIONAL DATA

All dimensions are in inches.

 

 

                                    Type  

 

  Thread 

                         Fastener Material  Thread

  Size x 

 Stainless    Hardened 

Code

 Pitch  Steel 

Steel 

Aluminum  Stainless Steel

 

M3 x 0.5 

SO 

SOS SOA  SO4

 M3 

3  4  6  8  10 12 14 16 18  –  –  –

 

       3.5M3

(1)

  M3.5 x 0.6 

SO 

SOS 

SOA 

SO4 

M3.5 

3 

4 

6 

8 

10 

12 

14 

16 

18 

20 

22 

25

  M4 x 0.7 

SO 

SOS 

SOA 

SO4 

M4 

3 

4 

6 

8 

10 

12 

14 

16 

18 

20 

22 

25

 M5 x 0.8 

SO 

SOS 

SOA 

SO4 

M5 

3 

4 

6 

8 

10 

12 

14 

16 

18 

20 

22 

25

 

D Dimension ±0.25

 

None 

4 

8 11

THREAD SIZE AND LENGTH SELECTION DATA

All dimensions are in inches.

All dimensions are in millimeters.

Length “L” +.002 –.005 (Length Code in 32nds of an inch)

Length “L” +0.05 –0.13

(Length Code in millimeters)

SO™/SOS™/SOA™/SO4™ - THROUGH-HOLE THREADED STANDOFFS

Varies 

according 

to length.

See length 

charts 

below.

Varies 

according 

to length.

See length 

charts 

below.

SO™/SOS™/SOA™/SO4™

 

through hole 

threaded 

self-clinching standoffs

 -

PAGE 3

BSO™/BSOS™/BSOA™/BSO4™

 

Blind hole, 

threaded 

self-clinching standoffs - 

PAGE 4

SO™/SOS™/SOA™/SO4™

 

Through hole, 

unthreaded

 self-clinching standoffs

 - 

PAGE 5

TSO™/TSOS™/TSOA™/TSO4™

 

Through hole 

threaded standoffs 

for clinching into 

thinner sheets

 than SO™ standoffs 

- 

PAGE 6

DSOS™/DSO™

 

Through hole, threaded 

standoffs with round, knurled head 

allowing closer-to-edge clinch 

installation

 

- 

PAGE 7

SOSG™/SOAG™

 

Through hole, threaded 

grounding standoffs with 

“grounding/

earthing teeth” on end of barrel

 

- 

PAGE 7

Material and finish specifications -

 

PAGE 8

Installation -

 

PAGES 8 - 11

Performance data -

 

PAGES 12 & 13

SO   – 440 –  8 

ZI

SO 

S – 440 –  8

SO 

A – 440 –  8

SO 

4 – 440 –  8  NC*

PART NUMBER DESIGNATION

Material

Code

Thread

Code

Length 

Code

Type

Finish

SO/SOS/SOA

SO4

Installs into stainless steel

Clinching profile may vary.

H

L

D

B

C

PEM® “Single” or PEM® “Two Groove” Registered Trademark

HEAD SIDE OF SHEET AFTER INSTALLATION

A p p l i c a t i o n   R e q u i r e s :

PEM®

Standoff

Type

(1) See note 5 on page 8 about installing fasteners into stainless steel sheets.        (2) When used with optional nickel plating.        (3) Style #3 only.

BSO/BSOS/BSOA/BSO4

TSO/TSOS/TSOA/TSO4 (Style 3)

DSOS/DSO

* NC suffix is required if optional nickel plating (for corrosion resistance) is desired. 

Otherwise, no suffix is necessary.

 Installation  Superior 

 

Closed-end 

Grounding/ 

Closest-to-edge 

 

Thinnest 

Most varied

  into stainless 

corrosion 

Threads at 

for flush 

earthing teeth 

distance 

Available 

minimum 

standard length  Non-magnetic

 steel 

(1)

 

resistance 

barrel end 

appearance 

on barrel end 

mounting 

Unthreaded 

sheet 

increments

Micro sizes also available.

See PEM® 

Bulletin MPF

 for more information.

•

  SO standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 / HB (Hardness Brinell) 150 or less.

•

  SOS standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 / HB (Hardness Brinell) 125 or less.

•

  SOA standoffs are recommended for use in aluminum sheets HRB (Rockwell “B” scale) 50 / HB (Hardness Brinell) 82 or less.

•

  SO4 standoffs are recommended for use in stainless steel sheets HRB (Rockwell “B” scale) 88 / HB (Hardness Brinell) 183 or less.

SO-4

    

PennEngineering • 

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PennEngineering • 

www.pemnet.com

    

SO-5

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

ME

TR

IC

U

NIF

IE

D

ME

TR

IC

U

NIF

IE

D

ME

TR

IC

U

NIF

IE

D

ME

TR

IC

U

NIF

IE

D

   Min. 

Hole Size

 Thread  Sheet 

In Sheet 

C H 

Min. Dist. 

F

 Code Thickness +.003 

+.000 Nom. Hole 

C/

 

Min.

     -.000 

-.005  To Edge

 440  .040  .166  .165  .187  .23
 6440  .040  .213  .212  .250  .27
 632  .040  .213  .212  .250  .27
 8632  .050  .281  .280  .312  .31
 832  .050  .281  .280  .312  .31
 032  .050  .281  .280  .312  .31

 

 

                               Type  

 

 Thread 

 

 

 

 

Thread

  Size x 

 Stainless   

Hardened 

Code

 Pitch 

Steel 

Steel 

Aluminum 

Stainless Steel

 

M3 x 0.5 BSO  BSOS  BSOA 

BSO4

 

M3 

6  8  10  12  14  16  18  20  22 25

  

 

 

 

 

3.5M3

(1)

 M3.5 x 0.6 

BSO 

BSOS 

BSOA 

BSO4 

M3.5 

6 

8 

10 

12 

14 

16 

18 

20 

22 

25 

 M4 

x 0.7 

BSO 

BSOS 

BSOA 

BSO4 

M4 

6 

8 

10 

12 

14 

16 

18 

20 

22 

25

 M5 x 

0.8 

BSO 

BSOS 

BSOA BSO4 M5 

6 8 10 

12 

14 

16 18 

20 

22 

25

 

F Dimension Min.

 

3.2 4  5 6.5 

9.5

 

 

Min. 

Hole Size 

 

 

Min. Dist.

 

Thread 

Sheet 

In Sheet 

C H 

Hole 

C/

 

F

 

Code  Thickness +0.08  -0.13 Nom. 

To Edge 

Min.

 M3  1  4.22  4.2  4.8  6
 3.5M3  1  5.41  5.39  6.4  6.8
 M3.5  1  5.41  5.39  6.4  6.8
 M4  1.27  7.14  7.12  7.9  8

 

M5  1.27 7.14 7.12  7.9  8

   Min. 

Hole Size

 Thru-hole  Sheet 

In Sheet 

C H 

Min. Dist.

 Code Thickness +.003 

+.000 Nom. Hole 

C/

     -.000 

-.005  To Edge

 4116  .040  .166  .165  .187  .23
 6116  .040  .213  .212  .250  .27
 6143  .040  .213  .212  .250  .27
 8143  .050  .281  .280  .312  .31
 8169  .050  .281  .280  .312  .31
 8194  .050  .281  .280  .312  .31

 

 

Min. 

Hole Size 

 

 

Min. Dist.

 

Thru-hole 

Sheet 

In Sheet 

C H 

Hole 

C/

  Code  Thickness +0.08  -0.13 Nom. 

To Edge

 43.1  1  4.22  4.2  4.8  6
 63.1  1  5.41  5.39  6.4  6.8
 63.6  1  5.41  5.39  6.4  6.8
 83.6  1.27  7.14  7.12  7.9  8
 84.1  1.27  7.14  7.12  7.9  8
 85.1  1.27  7.14  7.12  7.9  8

 

B 

                              Type

  Thru-hole

  Diameter 

 Stainless   

Hardened Thru-hole

  +0.1 -0.08  Steel 

Steel 

Aluminum 

Stainless Steel Code

 

3.1      

SO4

 43.1 

3 4 6 8 10 12 14 16 18 20

   S0 SOS  SOA  63.1

(1) 

 

3.6  SO SOS  SOA 

SO4

 

63.6 

3 4 6 8 10 12 14 16 18 20

  

 

 

 

 

83.6

(1)

 

4.1 

SO 

SOS SOA  SO4  84.1 3 4 6 8 10 12 14 16 18 20

 

5.1 

SO 

SOS SOA  SO4  85.1 3 4 6 8 10 12 14 16 18 20

 

B 

                              Type

  Thru-hole    

 

 

 

  Diameter 

 Stainless   

Hardened Thru-hole

  +.004 -.003  Steel 

Steel 

Aluminum 

Stainless Steel Code  .125  .187  .250  .312  .375  .437  .500  .562 .625  .687  .750

 

.116  SO SOS  SOA 

SO4

 4116 

4  6  8  10 12  14  16  18 20 22 24

  

 

 

 

 

6116

(1)

  .143 SO SOS  SOA  SO4 

6143 

4  6  8  10 12  14  16  18 20 22 24

  

 

 

 

 

8143

(1)

  .169  SO SOS  SOA 

SO4 

8169  4  6  8  10  12  14  16  18  20  22  24

  .194  SO SOS  SOA 

SO4 

8194  4  6  8  10 12  14  16  18 20 22 24

All dimensions are in millimeters.

GENERAL DIMENSIONAL DATA

All dimensions are in inches.

THREAD SIZE AND LENGTH SELECTION DATA

All dimensions are in inches.

All dimensions are in millimeters.

Length “L” +0.05 –0.13

(Length Code in millimeters)

All dimensions are in millimeters.

GENERAL DIMENSIONAL DATA

All dimensions are in inches.

THROUGH-HOLE AND LENGTH SELECTION DATA

All dimensions are in inches.

All dimensions are in millimeters.

BSO™/BSOS™/BSOA™/BSO4™ - BLIND THREADED STANDOFFS

SO™/SOS™/SOA™/SO4™ - THROUGH-HOLE UNTHREADED STANDOFFS 

(SPECIAL ORDER)

 

Length “L” +.002 –.005 (Length Code in 32nds of an inch)

Length “L” +0.05 –0.13

(Length Code in millimeters)

 

 

                          Type

  Thread      

 

Thread 

  Size 

 Stainless   

Hardened 

Code

 

  

Steel 

Steel 

Aluminum  Stainless Steel    .312  .375  .437 .500  .562 .625 .687  .750  .812  .875 .937  1.00 1.062

  .112-40 

BSO 

BSOS BSOA  BSO4 

440 

10  12  14  16  18  20  22 24  26 28 30 32 34

 (#4-40) 

 

   

 6440

(1)

  .138-32 BSO  BSOS  BSOA 

BSO4 

632 

10  12  14  16  18  20  22 24  26 28 30 32 34

  (#6-32) 

 

  

 8632

(1)

  .164-32 

BSO BSOS  BSOA 

BSO4 

832  10  12  14  16  18  20  22  24  26  28  30  32  34

  (#8-32)
  .190-32 

BSO BSOS  BSOA 

BSO4 

032  10  12  14  16  18  20  22  24  26  28  30  32  34

  (#10-32)
 

F Dimension Min.

 

.156 .187 

.250 

.375

Varies 

according 

to length.

See length 

charts 

below.

Varies 

according 

to length.

See length 

charts 

below.

BSO   – 440 – 12 

ZI

BSO 

S – 440 – 12

BSO 

A – 440 – 12

BSO 

4 – 440 – 12  NC*

PART NUMBER DESIGNATION

Material

Code

Thread

Code

Length 

Code

Type

Finish

Length “L” +.002 –.005 (Length Code in 32nds of an inch)

BSO/BSOS/BSOA

SO   – 4116 –  8 

ZI

SO 

S – 4116 –  8

SO 

A – 4116 –  8

SO 

4 – 4116 –  8  NC*

PART NUMBER DESIGNATION

Material

Code

Thru-hole

Code

Length 

Code

Type

Finish

SO/SOS/SOA

PEM® “Single” or PEM® “Two Groove” Registered Trademark

Clinching profile may vary.

H

C

F

L

BSO4

Installs into stainless steel

SO4

Installs into stainless steel

(1)  Standoffs with thread codes 6440, 8632, and 3.5M3 have a thicker wall to provide more bearing surface for the mating component or panel 

reducing the chance of cracking or cutting into the board.

Please contact your local PEM® distributor for availability, minimum quantity, and pricing information.

(1)  Standoffs with thru-hole codes 6116, 8143, 63.1 and 83.6 have a thicker wall to provide more bearing surface for the mating component or panel 

reducing the chance of cracking or cutting into the board.

Please contact your local PEM® distributor for availability, minimum quantity, and pricing information.

* NC suffix is required if optional nickel plating (for corrosion resistance) 

is desired. Otherwise, no suffix is necessary.

* NC suffix is required if optional nickel plating (for corrosion resistance) is desired. Otherwise, no suffix is necessary.

H

L

C B

Clinching profile may vary.

PEM® “Single” or PEM® “Two Groove” Registered Trademark

Micro sizes also available.

See PEM® 

Bulletin MPF

 for more information.

•

  BSO standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 / HB (Hardness Brinell) 150 or less.

•

  BSOS standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 / HB (Hardness Brinell) 125 or less.

•

  BSOA standoffs are recommended for use in aluminum sheets HRB (Rockwell “B” scale) 50 / HB (Hardness Brinell) 82 or less.

•

  BSO4 standoffs are recommended for use in stainless steel sheets HRB (Rockwell “B” scale) 88 / HB (Hardness Brinell) 183 or less.

•

  SO standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 / HB (Hardness Brinell) 150 or less.

•

  SOS standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 / HB (Hardness Brinell) 125 or less.

•

  SOA standoffs are recommended for use in aluminum sheets HRB (Rockwell “B” scale) 50 / HB (Hardness Brinell) 82 or less.

•

  SO4 standoffs are recommended for use in stainless steel sheets HRB (Rockwell “B” scale) 88 / HB (Hardness Brinell) 183 or less.

SO-6

    

PennEngineering • 

www.pemnet.com

PennEngineering • 

www.pemnet.com

    

SO-7

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

ME

TR

IC

U

NIF

IE

D

U

NIF

IE

D

ME

TR

IC

 

Thread 

Length “L” 

Length “L” 

Length “L”

 Code 

(Style #1)

 

(Style #2)

 

(Style #3)

  256 / 6256 

.090 - .250 

.251 - .375 

.376 - .750

  440 / 6440 

.090 - .280 

.281 - .450 

.451 - .750

 

632 

.120 - .350 

.351 - .540 

.541 - .750

 

Thread 

Length “L” 

Length “L” 

Length “L”

 Code 

(Style #1)

 

(Style #2)

 

(Style #3)

  M25 / 6M25 

2.00 - 6.30 

6.32 - 9.50 

9.52 - 19.00

  M3 / 6M3 

2.00 - 7.50 

7.52 - 11.00 

11.02 - 19.00

 

M35 

3.00 - 8.80 

8.82 - 12.80 

12.82 - 19.00

 

 

 

Type 

 

 

 

 

Hole Size 

 

 

L 

(1)

 

Min. Dist.

 Thread 

Stainless 

 

 

Thread 

Length 

Sheet 

In Sheet 

C 

H 

+.002 

Hole 

C/

 Size 

Steel  Steel 

Code 

Code 

Thickness 

+.003 -.000 

Max. 

Nom. 

-.005 

To Edge

 

.112-40 

DSOS   DSO 

440

 250 

.037 - .250 

.166 

.165 

.194

 .250 

.126

 

(#4-40) 

   

 

275 

 

 

 

 

.275

 

Thread 

 

Type 

 

 

 

 

Hole Size 

C   L 

(1)

 

Min. Dist.

 

Size x 

Stainless 

 

 

Thread 

Length 

Sheet 

In Sheet 

Max.  H  +0.05 Hole 

C/

 Pitch 

Steel  Steel  Code  Code  Thickness +0.08 

 

Nom.  -0.13  To Edge

 

M3 x 0.5 

DSOS 

 

DSO 

M3

 6.35 

0.94 - 6.35 

4.22 

4.2 

4.92

 6.35 

3.2

  

     

 

7     7

(1) Available in other lengths on special order.

Please contact your local PEM® distributor for availability, minimum quantity, and pricing information.

THREAD SIZE AND LENGTH SELECTION DATA

All dimensions are in inches.

All dimensions are in millimeters.

LENGTH/STYLE DATA

All dimensions are in inches.

(Length can be specified in .001” increments.)

All dimensions are in millimeters.

(Length can be specified in 0.02 mm increments.)

All dimensions are in inches.

All dimensions are in millimeters.

TSO™/TSOS™/TSOA™/TSO4™ THREADED STANDOFFS FOR SHEETS AS THIN AS .025”/0.63mm

DSOS™/DSO™ THREADED STANDOFFS - FOR CLOSE-TO-EDGE APPLICATIONS

ME

TR

IC

U

NIF

IE

D

 

              Min. Hole

  Thread                   

Type  

Thread 

        Sheet 

Size In 

C 

H 

P 

Min. Dist.

  Size    Code        Thick- Sheet +.000 ±.005 

Nom. Hole

C/L

   Stainless   

 

.125  .187  .250  .312 .375  .437 .500 

ness 

+.003 

–.005 

 

 

To Edge

 

 

Steel 

Aluminum 

           –.000

  .112-40 

SOSG 

SOAG 

6440 4  6  8  10 12  14 16 .040 .213 .212 .250 .030 .27

  (#4-40)
  .138-32 SOSG  SOAG  8632  4  6  8  10  12  14  16  .050  .281  .280  .312  .030  .31

  (#6-32)

  Thread 

 

 

 

 

 

           

 

  Min. Hole

  Size x 

Type

   Thread   

 

 

 

 

 

Sheet 

Size In 

C 

H 

P 

Min. Dist.

  Pitch  Stainless 

 

Code 

 

 

       

 

 

 

Thick- 

Sheet 

–0.13 

±0.25 

Nom. 

Hole

C/L

 

 

Steel 

Aluminum 

          

ness 

+0.08 

   

To Edge

  M3 x 0.5 

SOSG 

SOAG 

3.5M3 

3 

4 

6 

8 

10 

12 

1 

5.4 

5.39 

6.4 

0.76 

6.8

SOSG™/SOAG™ GROUNDING/EARTHING STANDOFFS

All dimensions are in inches.

All dimensions are in millimeters.

Metal

PC Board

or plastic

DSO  S – 440 – 250

DSO   – 440 – 250 

ZI

PART NUMBER DESIGNATION

Material

Code

Thread

Code

Length 

Code

Type

Finish

SO 

S 

G – 6440 – 10

SO 

A 

G – 6440 – 10

PART NUMBER DESIGNATION

Material

Code

Thread

Code

Length 

Code

Type

Grounding/

Earthing

Length “L” +0.25

 

(Length Code is in millimeters)

C

F

H

L

Style #3

TSO/TSOS/TSOA

(1) Style #1. Thru-threaded.

(2) Style #2. Screw might not pass through unthreaded end. Tapped to minimum full thread depth shown. Incomplete threads on tap may allow screw 

to pass through.

(3) Style #3. Blind.

(4) Standoffs with thread codes 6256, 6440, 6M25 and 6M3 have a thicker wall to provide more bearing

surface for the mating component or panel reducing the chance of cracking or cutting into the board.

Please contact your local PEM® distributor for availability, minimum quantity, and pricing information.

ME

TR

IC

U

NIF

IE

D

 

 

Min. 

Hole Size 

C 

F Min. 

 

Min. Dist.

 

Thread 

Sheet 

In Sheet 

+.000 

Thread 

H 

Hole 

C/

 

Code 

Thickness  +.003 -.000 

-.005 

Depth 

Nom. 

To Edge

 256 .025  .166  .165 

.200

 .187  .23

 6256 .025  .213  .212    .250 .27
 440 .025  .166  .165 

.220

 .187  .23

 6440 .025  .213  .212    .250 .27
  632  .025  .213  .212 .270 .250  .27

 

 

Min. 

Hole Size 

 

F Min. 

 

Min. Dist.

 

Thread 

Sheet 

In Sheet 

C 

Thread 

H 

Hole 

C/

 

Code 

Thickness 

+0.08 

-0.13 

Depth 

Nom. 

To Edge

  M25 0.63  4.22  4.2 

5.2

 4.8  5.8

  6M25 0.63  5.41  5.39    6.4  7.1
  M3 0.63  4.22  4.2 

6.2

 4.8  5.8

 

6M3 0.63  5.41  5.39    6.4  7.1

  M35 0.63  5.41  5.39 7  6.4  7.1

All dimensions are in millimeters.

GENERAL DIMENSIONAL DATA

All dimensions are in inches.

U

NIF

IE

D

 

 

                     Type

  

   

 Hardened 

 Thread 

 Stainless    Stainless  Thread 

.090 .125  .187  .250  .312  .375  .437  .500  .562 .625  .687  .750

 

Size 

Steel Steel  Aluminum  Steel Code 

 

 

 

     Length Code (Length “L” without decimal point)

  .086-56  TSO TSOS  TSOA  TSO4 

256 

090

(1)

 125

(1)

 187

(1)

 250

(1)

 312

(2)

 375

(2)

 437

(3)

 500

(3)

 562

(3)

 625

(3)

 687

(3)

 750

(3)

 (#2-56) 

 

 

 

 

6256

(4)

  .112-40 

TSO TSOS  TSOA  TSO4

 440 

090

(1)

 125

(1)

 187

(1)

 250

(1)

 312

(2)

 375

(2)

 437

(2)

 500

(3)

 562

(3)

 625

(3)

 687

(3)

 750

(3)

  (#4-40)    

 

 6440

(4)

  .138-32 

TSO TSOS  TSOA  TSO4  632  –  125

(1)

 187

(1)

 250

(1)

 312

(1)

 375

(2)

 437

(2)

 500

(2)

 562

(3)

 625

(3)

 687

(3)

 750

(3)

  (#6-32)

ME

TR

IC

  Thread 

                      Type

  Size x 

 

 

 

Hardened  Thread

 

Pitch 

 Stainless    Stainless Code 

2.00 3.00 4.00  6.00  8.00  10.00  12.00 14.00  16.00  18.00  19.00

   Steel Steel  Aluminum  Steel 

 

 

      

 

 Length Code (Length “L” without decimal point)

  M2.5 x 0.45 TSO  TSOS  TSOA  TSO4 

M25 200

(1)

 300

(1)

 400

(1)

 600

(1)

 800

(2)

 1000

(3)

 1200

(3)

 1400

(3)

 1600

(3)

 1800

(3)

 1900

(3)

  

   

 

 

6M25

(4)

  M3 x 0.5 TSO  TSOS  TSOA  TSO4  M3 200

(1)

 300

(1)

 400

(1)

 600

(1)

 800

(2)

 1000

(2)

 1200

(3)

 1400

(3)

 1600

(3)

 1800

(3)

 1900

(3)

  

 

 

 

 

6M3

(4)

  M3.5 x 0.6 TSO  TSOS  TSOA 

TSO4  M35

 

– 300

(1)

 400

(1)

 600

(1)

 800

(1)

 1000

(2)

 1200

(2)

 1400

(3)

 1600

(3)

 1800

(3)

 1900

(3)

Length “L” 

±

.003

For other lengths / thread depth data see chart at bottom of page.

Length “L” 

±

0.08

For other lengths / thread depth data see chart at bottom of page.

TSO4

Installs into stainless steel

* NC suffix is required if optional 

nickel plating (for corrosion 

resistance) is desired. Otherwise, 

no suffix is necessary.

TSO   – 440 – 250 

ZI

TSO 

S – 440 – 250

TSO  A – 440 – 250

TSO 

4 – 440 – 250  NC*

PART NUMBER DESIGNATION

Material

Code

Thread

Code

Length 

Code

Type

Finish

 

Length “L” +.010 -.000

(Length Code is in 32nds of an inch)

Style #1

C

L

Clinching profile may vary.

Style #2

C

F

L

PEM® “Single” or PEM® “Two Groove” 

Registered Trademark

Clinching profile may vary.

C

L

H

PEM® “Two Groove” Registered Trademark

Clinching profile may vary.

H

L

P

C

Grounding/

earthing Teeth

PEM® “Two Groove”

Registered Trademark

•

  DSO standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 80 / HB (Hardness Brinell) 150 or less.

•

  DSOS standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 / HB (Hardness Brinell) 125 or less.

•

  TSO standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 60 / HB (Hardness Brinell) 150 or less.

•

  TSOS standoffs are recommended for use in steel or aluminum sheets HRB (Rockwell “B” scale) 70 / HB (Hardness Brinell) 125 or less.

•

  TSOA standoffs are recommended for use in aluminum sheets HRB (Rockwell “B” scale) 50 / HB (Hardness Brinell) 82 or less.

•

  TSO4 standoffs are recommended for use in stainless steel sheets HRB (Rockwell “B” scale) 88 / HB (Hardness Brinell) 183 or less.

SO-8

    

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SO-9

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

 

Threads 

(1)

 

Fastener Materials 

Standard Finishes 

Optional Finish 

For Use In Sheet Hardness:  

(4)

 

 

Internal, ASME 

 

Non-heat 

 

300 

Hardened 

Zinc Plated 

Passivated 

 

Electroless Nickel

 

 

B1.1, 2B 

Hardened 

Treated 

 

Series 

400 Series 

per ASTM B633, 

and/or Tested 

 

over Copper over 

HRB 88 / 

HRB 80 / 

HRB 70 / 

HRB 60 / 

HRB 50 /

  Type 

ASME 

Carbon 

Carbon 

Aluminum  Stainless  Stainless Steel  SC1 (5µm),  Type III 

Per ASTM 

No 

Nickel Strike 

HB 183 

HB 150 

HB 125 

HB 107 

HB 82

  

B1.13M, 6H 

Steel 

Steel 

 

Steel 

(5) 

Colorless (2) 

A380 

Finish  Per ASTM B733 (2) (3) 

or Less 

or Less 

or Less 

or Less 

or Less

 

SO 

•  •      

• 

    

 •

 SOA 

•    •    

 

 •   

       •

 SOS 

•        •   

 

•  

 

    •

 SO4 

•       • 

 

•   •  •

 BSO 

•  •      

• 

    

 •

 BSOA 

•    •    

 

 •   

       •

 BSOS 

•        •   

 

•  

 

    •

 BSO4 

•       • 

 

•   •  •

 TSO 

•   •      

• 

  

 

     •

 TSOS 

•        •   

 

•  

 

    •

 TSOA 

•    •    

 

 •   

       •

 TSO4 

•       • 

 

•   •  •

 DSO 

•  •      

• 

    

 •

 DSOS 

•        •   

 

•  

 

    •

 SOAG 

•    •    

 

 •   

       •

 SOSG 

•        •   

 

•  

 

    •

 

 Part Number Codes For Finishes 

 

 

 

 

ZI 

None 

None 

NC

REQUIRED INSTALLATION 

ANVIL FOR SHEETS BELOW 

.032” / 0.81 mm

L* Min.

B

120˚

PUNCH

ANVIL

SO™/SOS™/SOA™/SO4™/BSO™/BSOS™/BSOA™/BSO4™ STANDOFFS

1.

  Prepare properly sized mounting hole in sheet. Do not perform any 

secondary operation such as deburring.

2.

  Insert standoff through mounting hole (preferably the punch side) of 

sheet and into anvil as shown in drawing.

3.

  With installation punch and anvil surfaces parallel, apply only enough 

squeezing force to embed the standoff’s head flush in the sheet. 

Drawing at right shows suggested tooling for applying these forces.

C*

L* Min.

PUNCH

+.004” to +.007” /

+0.1 mm  to +0.18 mm

ANVIL

TSO™/TSOS™/TSOA™/TSO4™ STANDOFFS

1.

  Prepare properly sized mounting hole in sheet. Do not perform 

any secondary operation such as deburring.

2.

  Insert standoff through mounting hole (preferably the punch 

side) of sheet and into anvil as shown in drawing.

3.

  With installation punch and anvil surfaces parallel, apply only 

enough squeezing force to embed the standoff’s head flush in 

the sheet. Drawing at right shows required installation anvil 

for sheet thickness of .025” to .032” / 0.63 mm to 0.81 mm. A 

chamfered anvil is not required for sheets over .032” / 0.81 mm.

INSTALLATION

INSTALLATION

(1)  Where applicable.

(2)  See PEM Technical Support section of our website for related plating standards and specifications.

(3)  Not stocked, available on special order. Minimum quantities apply. Contact your local PEM® distributor for details.

(4)  HRB - Hardness Rockwell “B” Scale.  HB - Hardness Brinell.

(5)  In order for self-clinching fasteners to work properly, the fastener must be harder than the sheet into which it is being installed (For more 

information, see our 

tech sheet

 for installing fasteners into stainless steel sheets). In the case of stainless steel panels, fasteners made from 300 

Series Stainless Steel do not meet this hardness criteria.  It is for this reason that SO4™, BSO4™ and TSO4™ 400 series fasteners are offered.  

However, while these 400 Series fasteners install and perform well in 300 Series stainless sheets they should not be used if the end product will 

be exposed to any appreciable corrosive environment (unless finished with optional nickel plating), requires non-magnetic fasteners or will be 

exposed to any temperatures above 300˚F (149˚C). If any of the these are issues, please contact 

techsupport@pemnet.com

 for other options.

MATERIAL AND FINISH SPECIFICATIONS

 

Thread 

HAEGER® Part No. 

PEMSERTER® Part Number

 Code 

Anvil Punch Anvil Punch

 440/M2/M2.5/M3 

H-109-4/M3L  H-108-0020L  970200487300  975200048

 632/6440/3.5M3/M3.5  H-109-6/M3.5L 

H-108-0020L 

970200012300 

975200048

 832/8632/032/M4/M5  H-109-8-10/M5L 

H-108-0020L 

970200013300 

975200048

  0420/M6 

H-109-04/M6L  H-108-0020L 970200393300 975200048

Installation Tooling

U

NIF

IE

D

 

HAEGER® Part Numbers 

PEMSERTER® Part Numbers

  

 

 

Anvil       Anvil 

  

 

Thread 

 

 

For sheets 

 

 

 

For Sheets 

 Code 

B Anvil 

Over .032” 

Punch 

B Anvil 

Over .032” 

Punch

 256/440 

(1) 

(1) 

H-109-4/M3L H-108-0020L 

.187 - .194 

8003291 

970200487300 

975200048

 6256/6440/632 

(1) 

(1) 

H-109-6/M3.5L H-108-0020L 

.250 - .257 

8003292 

970200012300 

975200048

Installation Tooling

C*

Anvil Dimensions (in.)

For Sheets Below .032”

+.001” to +.004” /

+0.03 mm  to +0.1 mm

*See page 6 for “C” 

and “L”.

*See pages 3 & 4 

for “C” and “L”.

(1) 

Click here

 for a quote on Haeger® custom anvil installation tooling.

Anvil Dimensions (in.)

For Sheets Below .032”

ME

TR

IC

 

HAEGER® Part Numbers 

PEMSERTER® Part Numbers

  

 

 

Anvil       Anvil 

  

 

Thread 

 

 

For sheets 

 

 

 

For Sheets 

 Code 

B Anvil 

Over 0.81 mm 

Punch 

B Anvil 

Over 0.81 mm 

Punch

 M2.5/M3 

(1) 

(1) 

H-109-4/M3L H-108-0020L 

4.75 - 4.93 

8003291 

970200487300 

975200048

 6M25/6M3/M35 

(1) 

(1) 

H-109-6/M3.5L H-108-0020L 

6.35 - 6.53 

8003292 

970200012300 

975200048

Anvil Dimensions (mm)

For Sheets Below 0.81 mm

Anvil Dimensions (mm)

For Sheets Below 0.81 mm

SO-10

    

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SO-11

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

DSOS™/DSO™ STANDOFFS

1.

  Prepare properly sized mounting hole in sheet.

 

Do not perform any secondary 

operations such as deburring.

2.

  Insert fastener through mounting hole (preferably the punch side) and into 

anvil as shown in drawing.

3.

  With installation punch and anvil surfaces parallel, apply only enough 

squeezing force to embed the standoff’s head flush in the sheet.

ANVIL

L* Min.

PUNCH

*See page 7 for 

“D” and “L”.

Installation Tooling

C*

PUNCH

ANVIL

+.004” to +.007” /

+0.1 mm  to +0.18 mm

*See page 7 for “C” 

and “L”.

SOSG™/SOAG™ STANDOFFS

1.

  Prepare properly sized mounting hole in sheet.

 

Do not perform any secondary 

operations such as deburring.

2.

  Insert fastener through mounting hole (preferably the punch side) and into 

anvil as shown in drawing.

3.

  With installation punch and anvil surfaces parallel, apply only enough 

squeezing force to embed the standoff’s head flush in the sheet.

PEMSERTER® Installation Tooling

C*

+.004” to +.007” /

+0.1 mm  to +0.18 mm

L* Min.

INSTALLATION NOTES

•

  For best results we recommend using a Haeger® or PEMSERTER® press for installation of PEM® standoffs. Please check our website for more information.

•

  Visit the Animation Library on our website to view the installation process 

for this product

.

 

Thread 

HAEGER® Part No. 

PEMSERTER® Part Number

 Code 

Anvil Punch  Anvil Punch

 440/M3 

H-109-4/M3L  H-108-0020L  970200487300  975200048

 6440/3.5M3 

H-109-6/M3.5L 

H-108-0020L 

970200012300 

975200048

 

8632 

H-109-8-10/M5L 

H-108-0020L  

970200013300 

975200048

 

Thread 

HAEGER® Part No. 

PEMSERTER® Part Number

 Code 

Anvil Punch  Anvil Punch

 440/M3 

H-109-4/M3L  H-108-0020L  970200487300  975200048

 6440/3.5M3 

H-109-6/M3.5L 

H-108-0020L 

970200012300 

975200048

 

8632 

H-109-8-10/M5L 

H-108-0020L  

970200013300 

975200048

For Additional HAEGER® and PEMSERTER® Tooling Information / Part Numbers

Or download the  

HAEGER WIZZARD

 Phone App

HAEGER® MANUAL TOOLING CATALOG

PEMSERTER® MANUAL TOOLING CATALOG

HAEGER® AUTO TOOLING CATALOG

PEMSERTER® AUTO TOOLING CATALOG

Go to 

haeger.com

 to access  

the Auto and Manual Tooling Wizards

} }

SO-12

    

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SO-13

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

ME

TR

IC

U

NIF

IE

D

 

 

 

Max. Rec. 

Test Sheet Material 

(2)

 

Thread Standoff Tightening 

.060” 5052-H34 Aluminum 

.060” Cold-rolled Steel

 

Code Material 

Torque For

 

 

 

Mating Screw 

Installation 

Pushout 

Torque-out 

(3)

 Pull-thru 

(3)

 Installation  Pushout  Torque-out 

(3)

 Pull-thru 

(3)

 

 

 

(in. lbs.) 

(lbs.) 

(lbs.) 

(in. lbs.) 

(lbs.) 

(lbs.) 

(lbs.) 

(in. lbs.) 

(lbs.)

   Steel  4.75  1100  160  11  280  2200 225  19  330

 

440 

Stainless Steel 

3.8 

1100 

160 

11 

224 

2200 

225 

19 

264

 

 

Aluminum 

2.85 

1100 

160 11 168 – – – –

    Steel  4.75  1700 300  25  310  3300 420  35  380

 

6440 

Stainless Steel 

3.8 

1700 

300 

25 

248 

3300 

420 

35 

304

 

 

Aluminum 

2.85 

1700 

300 

25 

186 – – – –

    Steel  8.75  1700 300  25  310  3300 420  35  380

 

632 

Stainless Steel 

7 

1700 

300 

25 

248 

3300 

420 

35 

304

 

 

Aluminum 

5.25 

1700 

300 

25 

186 – – – –

    Steel  8.75  2400 400  45  580  4000 560  75  700

 

8632 

Stainless Steel 

7 

2400 

400 

45 

464 

4000 

560 

75 

560

 

 

Aluminum 

5.25 

2400 

400 

45 

248 – – – –

    Steel  18  2400 400  45  580  4000 560  75  700

 

832 

Stainless Steel 

14.4 

2400 

400 

45 

464 

4000 

560 

75 

560

 

 

Aluminum 

11 

2400 

400 

45 

348 – – – –

    Steel  32  2400 400  45  580  4000 560  75  700

 

032 

Stainless Steel 

25.6 

2400 

400 

45 

464 

4000 

560 

75 

560

 

 

Aluminum 

19 

2400 

400 

45 

348 – – – –

 

 

 

Max. Rec. 

Test Sheet Material 

(2)

 

Thread Standoff Tightening 

1.5 mm 5052-H34 Aluminum 

1.5 mm Cold-rolled Steel

 

Code Material 

Torque For

 

 

 

Mating Screw 

Installation 

Pushout 

Torque-out 

(3)

 Pull-thru 

(3)

 Installation  Pushout  Torque-out 

(3)

 Pull-thru 

(3)

  

  (N•m) (kN)  (N) (N•m) (N)  (kN)  (N) (N•m) (N)

   Steel 0.55  4.9  710  1.24 1245  9.8 1000 2.15 1465

 

M3 

Stainless Steel 

0.44 

4.9 

710 

1.24 

996 

9.8 

1000 

2.15 

1172

    Aluminum 0.33  4.9  710  1.24  747 

– – – –

   Steel 0.55  7.6  1330 2.82 1375  14.7 1860 3.95 1690

 

3.5M3 

Stainless Steel 

0.44 

7.6 

1330 

2.82 

1100 

14.7 

1860 

3.95 

1352

 

 

Aluminum 

0.33 

7.6 

1330 

2.82 

825 – – – –

   Steel  0.91  7.6  1330 2.82 1375  14.7 1860 3.95 1690

 

M3.5 

Stainless Steel 

0.73 

7.6 

1330 

2.82 

1100 

14.7 

1860 

3.95 

1352

 

 

Aluminum 

0.55 

7.6 

1330 

2.82 

825 – – – –

   Steel  2  10.7 1780 5.08 2575  17.8 2490 8.47  3110

 

M4 

Stainless Steel 

1.6 

10.7 

1780 

5.08 

2060 

17.8 

2490 

8.47 

2488

 

 

Aluminum 

1.2 10.7 

1780 

5.08 

1545 – – – –

   Steel  3.6  10.7 1780 5.08 2575  17.8 2490 8.47  3110

 

M5 

Stainless Steel 

2.88 

10.7 

1780 

5.08 

2060 

17.8 

2490 

8.47 

2488

 

 

Aluminum 

2.16 

10.7 

1780 

5.08 

1545 – – – –

SO™/SOS™/SOA™/BSO™/BSOS™/BSOA™ STANDOFFS

(1)  Published installation forces are for general reference. Actual set-up and confirmation of complete installation should be made by 

observing proper seating of fastener as described in the installation steps.  Other performance values reported are averages when all 

proper installation parameters and procedures are followed. Variations in mounting hole size, sheet material, and installation procedure 

may affect performance.  Performance testing this product in your application is recommended.  We will be happy to provide technical 

assistance and/or samples for this purpose.

(2)  See 

tech sheet

 on our website for performance data of PEM® Type SO™ standoffs installed into copper sheets

.

(3)  Joint failure in torque-out and pull-thru will depend on the strength and type of screw being used. In some cases the failure will be in the screw 

and not in the self-clinching standoff. Please contact our Applications Engineering group with any questions.

PERFORMANCE DATA

(1)

ME

TR

IC

U

NIF

IE

D

DSOS™/DSO™ STANDOFFS

(1)  Published installation forces are for general reference. Actual set-up and confirmation of complete installation should be made by observing 

proper seating of fastener as described in the installation steps.  Other performance values reported are averages when all proper 

installation parameters and procedures are followed. Variations in mounting hole size, sheet material, and installation procedure may affect 

performance.  Performance testing this product in your application is recommended.  We will be happy to provide technical assistance and/

or samples for this purpose.

(2)  Joint failure in torque-out and pull-thru will depend on the strength and type of screw being used. In some cases the failure will be in the screw and 

not in the self-clinching standoff. Please contact our Applications Engineering group with any questions.

 

 

Max. Rec. 

 

 

                                          Test Sheet Material

  

Tightening 

                                           .040” 5052-H34 Aluminum 

 

                                            .040” Cold-rolled Steel

 

Thread 

Torque For 

 

 

Code 

Mating 

Screw 

Installation Pushout  Torque-out Pull-thru Installation Pushout Torque-out Pull-thru

 

 

(in. lbs.) 

(lbs.) 

(lbs.) 

(in. lbs.) 

(2)

 (lbs.)

 (2)

 

(lbs.) 

(lbs.) 

(in. lbs.) 

(2)

 (lbs.) 

(2)

 

440 3.8  700 

50 

10 

320  1100 

75 

10 

357

 

 

Max. Rec. 

 

 

                                          Test Sheet Material

  

Tightening 

                                           1 mm 5052-H34 Aluminum 

 

                                            1 mm Cold-rolled Steel

 

Thread 

Torque For 

 

 

Code 

Mating 

Screw 

Installation Pushout Torque-out Pull-thru Installation Pushout Torque-out Pull-thru

  

(N•m) 

(kN)  (N) (N•m) 

(2)

 (N) 

(2)

  (kN)  (N) (N•m) 

(2)

 (N) 

(2)

 

M3 0.44  3.1 

223 

1.1 

1422 

4.9 

334 

1.1  1587

PERFORMANCE DATA

(1)

U

NIF

IE

D

 

Thread 

Test Sheet Thickness and 

Installation 

Pushout 

Torque-out 

Pull-thru

 

Code 

 Test Sheet Material 

(lbs.) 

(lbs.) 

(in. lbs.) 

(2)

 (lbs.) 

(2)

 

6440 

.064” 5052-H34 Aluminum 1700 

300 

25 

186

 

8632 

.064” 5052-H34 Aluminum 1700 

400 

45 

248

SOSG™/SOAG™ STANDOFFS

ME

TR

IC

 Thread 

Test Sheet Thickness and 

Installation 

Pushout 

Torque-out 

Pull-thru

 

Code 

 Test Sheet Material 

(kN) 

(N) 

(N•m) 

(2) 

(N) 

(2)

 

3.5M3 

1.6 mm 5052-H34 Aluminum 

7.6 

1330 

2.82 

825

  Standoff “C” 

Standoff

 Dimension 

Material 

 

 

 

 Installation  

  Pushout   

 Torque-out 

(2)

  

Pull-thru 

(2)

 

  

Installation 

   

Pushout 

  

Torque-out 

(2)

 

 Pull-thru 

(2)

  

 

(lbs.)   (kN) 

(lbs.)   (N)  (in. 

lbs.) 

 (N•m)  (lbs.)   (N) 

(lbs.)  (kN) 

(lbs.)   (N)  (in. 

lbs.)  (N•m) 

  (lbs.)   (N)

 
  .165” / 

Steel 

700    3.1 

70    311 

6   0.68 

230  1022 

1100  4.9 

100  445 

9    1 

206  916

  4.2 mm  Stainless Steel  700    3.1 

70 

 

311 

6 

  0.68 

268    1191 

1100    4.9 

100    445 

9 

 

1 

260    1155

   

Aluminum  700  3.1 

70  311 

6  0.68  227  1009 

—   — 

—   — 

—   — 

—   —

  .212” / 

Steel 

700    3.1 

90   400 

11    1.24 

264    1173 

1800   8 

150   667 

15    1.7 

207   920

  5.39 mm  Stainless Steel 

700   

3.1 

90 

  400 

11 

  1.24 

340    1511 

1800   

8 

150    667 

15 

 

1.7 

344    1529

   

Aluminum  700  3.1 

90  400 

11  1.24 

300  1333 

—   — 

—   — 

—   — 

—   —

TSO™/TSOS™/TSOA™ STANDOFFS

ME

TR

IC

U

NIF

IE

D

 

 

Max. Rec. 

Test Sheet Material

 

Thread 

Tightening 

.050” 300 Series Stainless Steel

 

Code 

Torque For

 

 

Mating Screw 

Installation 

Pushout 

Torque-out 

Pull-thru

 

 

(in. lbs.) 

(lbs.) 

(lbs.) 

(in. lbs.) 

(3)

 (lbs.) 

(3)

  440 

4.75  5500 336  17  600 

  6440  4.75  9500 647  30  680
  632 

8.75  9500 647  30  680

 

8632 

8.75 

10500 

900 

71 

1392  

  832 

18  10500 900  71  1517

  032 

32  10500 900  71  1368

SO4™/BSO4™ STANDOFFS

 

 

Max. Rec. 

Test Sheet Material

 

Thread 

Tightening 

1.3 mm 300 Series Stainless Steel

 

Code 

Torque For

 

 

Mating Screw 

Installation 

Pushout 

Torque-out 

Pull-thru

 

 

(N•m)  (kN)  (N) (N•m) 

(3)

 (N) 

(3)

 

M3 

0.55 

24.5 

1493 

2.36 

2650  

  3.5M3  0.55  42.3  2877  3.06 3025
  M3.5 

0.91  42.3  2877  3.06 3025

  M4 

2 

46.7  4003  8.89 6458

  M5 

3.6 

46.7  4003  8.89 6226

 

Standoff “C”

 

Dimension 

 

Installation 

   

Pushout 

    

Torque-out 

(2)

  

  Pull-thru 

(2)

  

(lbs.)    (kN)    (lbs.)    (N)   (in. 

lbs.)   (N•m) 

(lbs.)    (N)

  .165” / 4.2 mm 

6500 

 

28.9 

 

125 

 

555 

 

13 

 

1.5 

414 

 

1840

  .212” / 5.39 mm 

6800 

 

30.3 

 

160 

 

710 

 

22 

 

2.5 

552 

 

2453

 

Test Sheet Material

.025” / 0.64 mm 300 series stainless steel

TSO4™ STANDOFFS

 

 

Test Sheet Material

 

.025” / 0.64 mm 5052-H34 Aluminum 

 

.025” / 0.64 mm Cold-rolled Steel

SO-14

    

PennEngineering • 

www.pemnet.com

PennEngineering • 

www.pemnet.com

    

SO-15

SELF-CLINCHING STANDOFFS

SELF-CLINCHING STANDOFFS

Thread Masking

PEM® PreTect™ thread masking plugs provide protection 

for PEM® internally threaded fasteners. They reduce labor 

and protect threads from paint 

and powder coating processes. 

Fasteners are shipped 

with plugs and film (where 

applicable) already in place. 

Plugs and film easily removed 

with a fine tip tool by end user. 

Click here

 for more information.

If you require a standoff which we do not offer in this bulletin, please contact us. We will be happy to work with you to satisfy 

your special need. For other types of standard PEM® brand standoffs and spacers see:

PEM® “Single Groove”

(Registered trademark)

Parts that install into 

stainless steel sheets

PEM® “Two Groove”

(Registered trademark)

Due to differences in manufacturing methods, location of 
grooves and  surface appearance on barrel of actual parts 
may be different than shown in photo.

For more information on how to use

PEM® self-clinching standoffs, see Tech Sheet

“

PEM®-Ref/Standoff Basics

”

on our web site.

Fastener drawings 

and models are 

available at

www.pemnet.com

Bulletin CH

PEM® concealed-head standoffs.

Bulletin SSA

PEM® SNAP-TOP® standoffs.

Bulletin SK

PEM® KEYHOLE® standoffs.

microPEM® standoffs.

Bulletin K

PEM® broaching and surface 

mount standoffs for printed 

circuit boards.

Bulletin MPF

SO-16

 

All PEM® products meet our stringent quality standards.  If you require additional industry or other specific 

quality certifications

, special procedures and/or part 

numbers are required.  Please contact your local sales office or representative for further information. 
Regulatory 

compliance information

 is available in Technical Support section of our website. Specifications subject to change without notice.  See our website for the 

most current version of this bulletin.

North America:

 

Danboro, Pennsylvania USA 

•

 E-mail: 

info@pemnet.com

 

•

 Tel: +1-215-766-8853 

•

 800-237-4736 (USA)

Europe:

 

Galway, Ireland 

•

 E-mail: 

europe@pemnet.com

 

•

 Tel: +353-91-751714

Asia/Pacific: 

Singapore 

•

 E-mail: 

singapore@pemnet.com

 

•

 Tel: +65-6-745-0660

Shanghai, China 

•

 E-mail: 

china@pemnet.com

 

•

 Tel: +86-21-5868-3688

Visit our PEMNET™ Resource Center at 

www.pemnet.com

 

•

 Technical support e-mail: 

techsupport@pemnet.com

SELF-CLINCHING STANDOFFS

5/10/22

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