Spin these shims onto screw threads to extend the shoulder length.

Stainless steel shims are more corrosion resistant than spring steel shims. 316 stainless steel shims have the best corrosion resistance of our stainless steel shims.

Spring steel shims are harder and hold their shape better than stainless steel shims.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

316 Stainless Steel

For Shoulder

Dia. For Screw

Size ID ID Tolerance OD OD Tolerance Min. Hardness Magnetic Properties Pkg.

Qty. Pkg.

0.005" Thick. (-0.0005" to 0.0005" Tolerance)

3/16" No. 8 0.146" 0" to 0.011" 0.178" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A452 $11.61

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A456 11.00

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A464 11.14

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A469 11.28

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A475 12.55

6mm M5 4.95mm 0mm to 0.25mm 5.96mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A110 11.29

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A120 11.43

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A130 11.71

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A150 12.29

0.015" Thick. (-0.001" to 0.001" Tolerance)

6mm M5 4.95mm 0mm to 0.25mm 5.96mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A170 10.00

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A180 10.00

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A190 10.29

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A210 10.86

0.016" Thick. (-0.002" to 0.002" Tolerance)

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A556 11.14

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A564 11.28

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A569 11.43

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A575 11.48

0.03" Thick. (-0.003" to 0.003" Tolerance)

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A656 11.05

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A664 11.11

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A669 11.34

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 91017A675 12.60

0.031" Thick. (-0.002" to 0.002" Tolerance)

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A240 12.86

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A250 12.29

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A260 12.14

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A270 10.57

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell B70 May Be Mildly Magnetic 10 94141A280 10.29

18-8 Stainless Steel

For Shoulder

Dia. For Screw

Size ID ID Tolerance OD OD Tolerance Min. Hardness Magnetic Properties Pkg.

Qty. Pkg.

0.005" Thick. (-0.0005" to 0.0005" Tolerance)

3/16" No. 8 0.146" 0" to 0.011" 0.178" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 90135A432 $10.16

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 50 90135A431 8.42

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 50 90135A433 11.09

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 50 90135A435 7.09

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A437 8.51

6mm M5 4.95mm 0mm to 0.25mm 5.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A221 13.72

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A304 14.06

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A416 15.41

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A508 14.85

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A610 15.48

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A701 16.60

0.01" Thick. (-0.001" to 0.001" Tolerance)

6mm M5 4.95mm 0mm to 0.25mm 5.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A228 12.65

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A312 13.11

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A424 14.03

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A511 14.12

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A618 14.94

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A712 15.63

0.015" Thick. (-0.001" to 0.001" Tolerance)

6mm M5 4.95mm 0mm to 0.25mm 5.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A236 12.14

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A318 12.31

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A433 12.62

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A517 13.22

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A623 14.00

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A717 14.40

0.016" Thick. (-0.002" to 0.002" Tolerance)

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 50 90135A443 18.21

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A445 12.31

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A447 17.66

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A449 16.20

5/8" 1/2" 0.473" 0" to 0.011" 0.616" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A451 20.64

0.02" Thick. (-0.0015" to 0.0015" Tolerance)

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A326 12.94

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A439 13.62

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A522 14.94

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A628 16.05

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A725 17.14

0.025" Thick. (-0.0015" to 0.0015" Tolerance)

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A331 13.49

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A444 14.37

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A526 16.05

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 5 91437A634 8.68

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 5 91437A734 10.72

0.03" Thick. (-0.003" to 0.003" Tolerance)

1/4" No. 10 0.171" 0" to 0.011" 0.241" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A455 8.69

5/16" 1/4" 0.234" 0" to 0.011" 0.303" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A457 7.68

3/8" 5/16" 0.289" 0" to 0.011" 0.365" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A459 15.82

1/2" 3/8" 0.352" 0" to 0.011" 0.491" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 25 90135A461 12.90

5/8" 1/2" 0.473" 0" to 0.011" 0.616" -0.002" to 0.002" Rockwell B70 May Be Mildly Magnetic 10 90135A463 6.73

0.031" Thick. (-0.002" to 0.002" Tolerance)

8mm M6 5.92mm 0mm to 0.25mm 7.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A337 14.47

10mm M8 7.82mm 0mm to 0.25mm 9.95mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A450 16.54

12mm M10 9.7mm 0mm to 0.25mm 11.96mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 10 91437A532 14.69

16mm M12 11.65mm 0mm to 0.25mm 15.5mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 5 91437A640 10.72

20mm M16 15.5mm 0mm to 0.25mm 19.93mm -0.25mm to 0mm Rockwell C40 May Be Mildly Magnetic 5 91437A738 12.43

1074-1095 Spring Steel

For Shoulder

Dia. For Screw

Size ID ID Tolerance OD OD Tolerance Min. Hardness Magnetic

Properties Pkg.

Qty. Pkg.

0.005" Thick. (-0.0005" to 0.0005" Tolerance)

3/16" No. 8 0.146" 0" to 0.011" 0.185" -0.002" to 0.002" Rockwell C40 Magnetic 10 91140A232 $8.66

1/4" No. 10 0.171" 0" to 0.011" 0.248" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A231 12.79

5/16" 1/4" 0.234" 0" to 0.011" 0.308" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A233 12.88

3/8" 5/16" 0.289" 0" to 0.011" 0.371" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A235 13.46

1/2" 3/8" 0.352" 0" to 0.011" 0.496" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A237 13.46

5/8" 1/2" 0.473" 0" to 0.011" 0.621" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A239 12.78

3/4" 5/8" 0.598" 0" to 0.011" 0.746" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A241 13.70

5mm M4 3.98mm 0mm to 0.254mm 5mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A121 11.21

6mm M5 4.976mm 0mm to 0.254mm 6mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A129 11.46

8mm M6 5.852mm 0mm to 0.254mm 8mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A137 7.15

10mm M8 7.688mm 0mm to 0.254mm 10mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A150 7.23

12mm M10 9.522mm 0mm to 0.254mm 12mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A161 7.29

0.015" Thick. (-0.001" to 0.001" Tolerance)

5mm M4 3.98mm 0mm to 0.254mm 5mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A125 12.46

6mm M5 4.976mm 0mm to 0.254mm 6mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A133 12.77

8mm M6 5.852mm 0mm to 0.254mm 8mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A142 6.74

10mm M8 7.688mm 0mm to 0.254mm 10mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A154 6.80

12mm M10 9.522mm 0mm to 0.254mm 12mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A164 7.54

16mm M12 11.355mm 0mm to 0.254mm 16mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A172 7.72

0.015" Thick. (-0.00075" to 0.00075" Tolerance)

1/4" No. 10 0.171" 0" to 0.011" 0.248" -0.002" to 0.002" Rockwell C40 Magnetic 50 91140A243 20.17

5/16" 1/4" 0.234" 0" to 0.011" 0.308" -0.002" to 0.002" Rockwell C40 Magnetic 50 91140A245 20.17

3/8" 5/16" 0.289" 0" to 0.011" 0.371" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A247 13.11

1/2" 3/8" 0.352" 0" to 0.011" 0.496" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A249 13.46

5/8" 1/2" 0.473" 0" to 0.011" 0.621" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A251 12.44

3/4" 5/8" 0.598" 0" to 0.011" 0.746" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A253 13.16

0.031" Thick. (-0.002" to 0.002" Tolerance)

8mm M6 5.852mm 0mm to 0.254mm 8mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A146 8.20

10mm M8 7.688mm 0mm to 0.254mm 10mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A158 8.26

12mm M10 9.522mm 0mm to 0.254mm 12mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A167 8.35

16mm M12 11.355mm 0mm to 0.254mm 16mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A175 8.51

20mm M16 15.19mm 0mm to 0.254mm 20mm -0.254mm to 0mm Rockwell C40 Magnetic 5 92927A179 8.51

0.032" Thick. (-0.0015" to 0.0015" Tolerance)

1/4" No. 10 0.187" 0" to 0.011" 0.248" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A255 13.46

5/16" 1/4" 0.234" 0" to 0.011" 0.308" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A257 13.46

3/8" 5/16" 0.296" 0" to 0.011" 0.371" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A259 12.78

1/2" 3/8" 0.352" 0" to 0.011" 0.496" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A261 14.74

5/8" 1/2" 0.473" 0" to 0.011" 0.621" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A264 16.66

3/4" 5/8" 0.598" 0" to 0.011" 0.746" -0.002" to 0.002" Rockwell C40 Magnetic 25 91140A266 16.66