SO-6 PennEngineering • www.pemnet.com

SELF-CLINCHING STANDOFFS

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

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.)

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

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.

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.

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)

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

Style #1

C

L

Clinching profile may vary.

Style #2

C

F

L

PEM® “Single” or PEM® “Two Groove”

Registered Trademark

• 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.