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Belleville Spring Lock Washers for Socket Head Screws
![](/prerenderstable/mvPRE/contents/gfx/imagecache/908/90895a207p1-b01-digitall@halfx_637135608282720363.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/935/93501a029p1-b01-digitall@halfx_637135629520714245.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/908/90895a029p1-b01-digitall@halfx_637135628370685282.png?ver=imagenotfound)
These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws. Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration. Serrations on the top and bottom provide extra gripping power. Load-rated Belleville disc springs are also available.
Zinc-plated steel washers are corrosion resistant in wet environments.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/thi/thickness-1646145727-p9@halfx_637817209363862611.png?ver=imagenotfound)
For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M1.6 | 0.067" | 0.126" | 0.014" | 0.024" | Rockwell C40 | 100 | 000000000 | 00000 |
M2 | 0.087" | 0.157" | 0.014" | 0.024" | Rockwell C40 | 100 | 000000000 | 0000 |
M2.5 | 0.106" | 0.189" | 0.018" | 0.035" | Rockwell C40 | 100 | 000000000 | 0000 |
M6 | 0.252" | 0.394" | 0.024" | 0.047" | Rockwell C40 | 100 | 000000000 | 00000 |
M12 | 0.512" | 0.709" | 0.039" | 0.067" | Rockwell C40 | 50 | 000000000 | 00000 |
M18 | 0.748" | 1.063" | 0.059" | 0.091" | Rockwell C40 | 10 | 000000000 | 0000 |
M20 | 0.827" | 1.181" | 0.059" | 0.098" | Rockwell C40 | 10 | 000000000 | 00000 |
M24 | 1.008" | 1.417" | 0.063" | 0.114" | Rockwell C40 | 5 | 000000000 | 00000 |
M27 | 1.126" | 1.535" | 0.071" | 0.122" | Rockwell C40 | 5 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
M1.6 | 0.067" | 0.126" | 0.014" | 0.024" | Rockwell C38 | 100 | 000000000 | 0000 |
M2 | 0.087" | 0.157" | 0.014" | 0.024" | Rockwell C38 | 100 | 000000000 | 0000 |
M2.5 | 0.106" | 0.189" | 0.018" | 0.035" | Rockwell C38 | 100 | 000000000 | 0000 |
M18 | 0.748" | 1.063" | 0.055" | 0.091" | Rockwell C38 | 10 | 000000000 | 00000 |
M20 | 0.827" | 1.181" | 0.055" | 0.098" | Rockwell C38 | 5 | 000000000 | 00000 |
M24 | 1.008" | 1.417" | 0.063" | 0.114" | Rockwell C38 | 5 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
M1.6 | 0.067" | 0.126" | 0.020" | 0.030" | Rockwell C38 | 50 | 000000000 | 00000 |
M2 | 0.087" | 0.157" | 0.014" | 0.024" | Rockwell C38 | 50 | 000000000 | 00000 |
M2.5 | 0.106" | 0.189" | 0.018" | 0.035" | Rockwell C38 | 50 | 000000000 | 00000 |
M7 | 0.291" | 0.472" | 0.028" | 0.051" | Rockwell C38 | 5 | 000000000 | 00000 |
M18 | 0.748" | 1.063" | 0.059" | 0.091" | Rockwell C38 | 1 | 000000000 | 0000 |
M20 | 0.827" | 1.181" | 0.059" | 0.098" | Rockwell C38 | 1 | 000000000 | 0000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/thi/thickness-1646145727-p9@halfx_637817209363862611.png?ver=imagenotfound)
For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Steel | ||||||||
---|---|---|---|---|---|---|---|---|
No. 5, M3 | 0.126" | 0.217" | 0.018" | 0.035" | Rockwell C40 | 100 | 000000000 | 00000 |
No. 6, M3.5 | 0.146" | 0.236" | 0.018" | 0.035" | Rockwell C40 | 100 | 000000000 | 0000 |
No. 8, M4 | 0.169" | 0.276" | 0.020" | 0.039" | Rockwell C40 | 100 | 000000000 | 0000 |
No. 10, M5 | 0.209" | 0.354" | 0.024" | 0.043" | Rockwell C40 | 100 | 000000000 | 0000 |
1/4", M6 | 0.264" | 0.374" | 0.028" | 0.047" | Rockwell C40 | 100 | 000000000 | 00000 |
5/16", M8 | 0.331" | 0.512" | 0.031" | 0.055" | Rockwell C40 | 100 | 000000000 | 00000 |
3/8", M10 | 0.413" | 0.630" | 0.039" | 0.063" | Rockwell C40 | 100 | 000000000 | 00000 |
7/16", M11 | 0.457" | 0.626" | 0.039" | 0.063" | Rockwell C40 | 100 | 000000000 | 00000 |
1/2", M12 | 0.539" | 0.748" | 0.043" | 0.071" | Rockwell C40 | 50 | 000000000 | 00000 |
9/16", M14 | 0.591" | 0.866" | 0.047" | 0.079" | Rockwell C40 | 50 | 000000000 | 00000 |
5/8", M16 | 0.669" | 0.945" | 0.051" | 0.083" | Rockwell C40 | 50 | 000000000 | 00000 |
3/4", M19 | 0.787" | 1.181" | 0.059" | 0.098" | Rockwell C40 | 25 | 000000000 | 00000 |
7/8", M22 | 0.906" | 1.299" | 0.059" | 0.106" | Rockwell C40 | 20 | 000000000 | 00000 |
1", M25 | 1.063" | 1.496" | 0.079" | 0.122" | Rockwell C40 | 10 | 000000000 | 00000 |
1 1/8", M30 | 1.244" | 1.772" | 0.079" | 0.142" | Rockwell C40 | 5 | 000000000 | 00000 |
1 3/8", M36 | 1.496" | 2.126" | 0.098" | 0.165" | Rockwell C40 | 5 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
No. 5, M3 | 0.126" | 0.217" | 0.018" | 0.035" | Rockwell C38 | 100 | 000000000 | 0000 |
No. 6, M3.5 | 0.146" | 0.236" | 0.020" | 0.035" | Rockwell C38 | 100 | 000000000 | 00000 |
No. 8, M4 | 0.169" | 0.276" | 0.020" | 0.039" | Rockwell C38 | 100 | 000000000 | 00000 |
No. 10, M5 | 0.209" | 0.354" | 0.024" | 0.043" | Rockwell C38 | 100 | 000000000 | 00000 |
1/4", M6 | 0.264" | 0.374" | 0.024" | 0.047" | Rockwell C38 | 50 | 000000000 | 00000 |
5/16", M8 | 0.331" | 0.512" | 0.028" | 0.055" | Rockwell C38 | 50 | 000000000 | 00000 |
3/8", M10 | 0.413" | 0.630" | 0.035" | 0.063" | Rockwell C38 | 25 | 000000000 | 0000 |
7/16", M11 | 0.457" | 0.626" | 0.035" | 0.063" | Rockwell C38 | 25 | 000000000 | 0000 |
1/2", M12 | 0.539" | 0.748" | 0.039" | 0.071" | Rockwell C38 | 25 | 000000000 | 0000 |
9/16", M14 | 0.591" | 0.866" | 0.043" | 0.079" | Rockwell C38 | 25 | 000000000 | 00000 |
5/8", M16 | 0.669" | 0.945" | 0.047" | 0.083" | Rockwell C38 | 25 | 000000000 | 00000 |
3/4", M19 | 0.787" | 1.181" | 0.055" | 0.098" | Rockwell C38 | 10 | 000000000 | 00000 |
7/8", M22 | 0.906" | 1.299" | 0.055" | 0.106" | Rockwell C38 | 5 | 000000000 | 00000 |
1", M25 | 1.063" | 1.496" | 0.071" | 0.122" | Rockwell C38 | 5 | 000000000 | 00000 |
1 1/16", M27 | 1.126" | 1.535" | 0.071" | 0.122" | Rockwell C38 | 5 | 000000000 | 00000 |
1 1/8", M30 | 1.244" | 1.772" | 0.071" | 0.142" | Rockwell C38 | 5 | 000000000 | 00000 |
1 3/8", M36 | 1.496" | 2.126" | 0.098" | 0.165" | Rockwell C38 | 1 | 000000000 | 0000 |
18-8 Stainless Steel | ||||||||
No. 5, M3 | 0.126" | 0.217" | 0.020" | 0.037" | Rockwell C38 | 50 | 000000000 | 00000 |
No. 6, M3.5 | 0.146" | 0.236" | 0.028" | 0.045" | Rockwell C38 | 50 | 000000000 | 00000 |
No. 8, M4 | 0.169" | 0.276" | 0.028" | 0.047" | Rockwell C38 | 50 | 000000000 | 00000 |
No. 10, M5 | 0.209" | 0.354" | 0.028" | 0.047" | Rockwell C38 | 25 | 000000000 | 00000 |
1/4", M6 | 0.264" | 0.374" | 0.028" | 0.047" | Rockwell C38 | 10 | 000000000 | 0000 |
5/16", M8 | 0.331" | 0.512" | 0.039" | 0.063" | Rockwell C38 | 10 | 000000000 | 0000 |
3/8", M10 | 0.413" | 0.630" | 0.039" | 0.063" | Rockwell C38 | 5 | 000000000 | 0000 |
7/16", M11 | 0.457" | 0.626" | 0.051" | 0.073" | Rockwell C38 | 5 | 000000000 | 0000 |
1/2", M12 | 0.539" | 0.748" | 0.051" | 0.073" | Rockwell C38 | 5 | 000000000 | 00000 |
9/16", M14 | 0.591" | 0.866" | 0.059" | 0.091" | Rockwell C38 | 1 | 000000000 | 0000 |
5/8", M16 | 0.669" | 0.945" | 0.059" | 0.091" | Rockwell C38 | 1 | 000000000 | 0000 |
3/4", M19 | 0.787" | 1.181" | 0.071" | 0.102" | Rockwell C38 | 1 | 000000000 | 0000 |
7/8", M22 | 0.906" | 1.299" | 0.071" | 0.118" | Rockwell C38 | 1 | 000000000 | 0000 |
1", M25 | 1.063" | 1.496" | 0.098" | 0.142" | Rockwell C38 | 1 | 000000000 | 00000 |
1 1/8", M30 | 1.244" | 1.772" | 0.098" | 0.161" | Rockwell C38 | 1 | 000000000 | 00000 |
1 3/8", M36 | 1.496" | 2.126" | 0.118" | 0.185" | Rockwell C38 | 1 | 000000000 | 00000 |
Belleville Spring Lock Washers
![](/prerenderstable/mvPRE/contents/gfx/imagecache/901/90127a115p1-b01-digitall@halfx_637260725372316473.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/901/90127a030matte-steelpositive_top_positive_front_washer_1620310324_819@halfx_637558891585815859.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/thi/thickness-1646145727-p9@halfx_637817209363862611.png?ver=imagenotfound)
Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration. Load-rated Belleville disc springs are also available.
Zinc-plated steel washers have an outer layer of zinc that protects the inner steel from rust in wet environments and extends the life of the washer.
For extra gripping power, use washers with a serrated top.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel with Serrated Top | ||||||||
---|---|---|---|---|---|---|---|---|
No. 6 | 0.142" | 0.362" | 0.025"-0.031" | 0.047" | Rockwell C40 | 50 | 000000000 | 00000 |
No. 8 | 0.161" | 0.402" | 0.036"-0.042" | 0.059" | Rockwell C40 | 10 | 000000000 | 0000 |
No. 10 | 0.201" | 0.481" | 0.047"-0.053" | 0.073" | Rockwell C40 | 10 | 000000000 | 0000 |
1/4" | 0.254" | 0.559" | 0.049"-0.055" | 0.087" | Rockwell C40 | 50 | 000000000 | 0000 |
5/16" | 0.323" | 0.717" | 0.052"-0.058" | 0.095" | Rockwell C40 | 25 | 000000000 | 0000 |
3/8" | 0.402" | 0.877" | 0.059"-0.065" | 0.108" | Rockwell C40 | 25 | 000000000 | 0000 |
7/16" | 0.489" | 1.074" | 0.075"-0.082" | 0.120" | Rockwell C40 | 10 | 000000000 | 0000 |
5/8" | 0.646" | 1.273" | 0.095"-0.101" | 0.156" | Rockwell C40 | 5 | 000000000 | 0000 |
Steel with Serrated Top | ||||||||
No. 6 | 0.142" | 0.362" | 0.025"-0.031" | 0.047" | Rockwell C40 | 100 | 000000000 | 00000 |
No. 8 | 0.161" | 0.402" | 0.036"-0.042" | 0.059" | Rockwell C40 | 100 | 000000000 | 00000 |
No. 10 | 0.201" | 0.481" | 0.047"-0.053" | 0.073" | Rockwell C40 | 50 | 000000000 | 0000 |
1/4" | 0.254" | 0.559" | 0.049"-0.055" | 0.087" | Rockwell C40 | 50 | 000000000 | 0000 |
5/16" | 0.323" | 0.717" | 0.052"-0.058" | 0.095" | Rockwell C40 | 50 | 000000000 | 00000 |
3/8" | 0.402" | 0.877" | 0.059"-0.065" | 0.108" | Rockwell C40 | 25 | 000000000 | 00000 |
7/16" | 0.489" | 1.074" | 0.075"-0.081" | 0.120" | Rockwell C40 | 10 | 000000000 | 0000 |
1/2" | 0.512" | 1.074" | 0.075"-0.081" | 0.120" | Rockwell C40 | 10 | 000000000 | 0000 |
5/8" | 0.646" | 1.273" | 0.095"-0.101" | 0.156" | Rockwell C40 | 5 | 000000000 | 0000 |