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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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 | Belleville |
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About Washers
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Mil. Spec. Split Lock Washers
Choose these washers for their adherence to strict military standards for material and construction. As a screw is tightened, they flatten to add tension to the joint and prevent loosening from small amounts of vibration.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have excellent corrosion resistance in most environments. They may be mildly magnetic.
Passivated stainless steel washers have added protection against oxidation and corrosion. Black-oxide stainless steel washers have a matte-black finish.
Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Passivated 316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
MS35338 | ||||||||
| No. 2 | 0.094" | 0.172" | 0.020" | Rockwell C35 | ASME B18.21.1; MS35338-134 | 100 | 000000000 | 00000 |
| No. 4 | 0.120" | 0.209" | 0.025" | Rockwell C35 | ASME B18.21.1; MS35338-135 | 100 | 000000000 | 0000 |
| No. 6 | 0.148" | 0.250" | 0.031" | Rockwell C35 | ASME B18.21.1; MS35338-136 | 100 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.293" | 0.040" | Rockwell C35 | ASME B18.21.1; MS35338-137 | 100 | 000000000 | 0000 |
| No. 10 | 0.200" | 0.334" | 0.047" | Rockwell C35 | ASME B18.21.1; MS35338-138 | 100 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.487" | 0.062" | Rockwell C35 | ASME B18.21.1; MS35338-139 | 50 | 000000000 | 0000 |
Black Oxide 316 Stainless Steel | ||||||||
MS35338 | ||||||||
| No. 2 | 0.094" | 0.172" | 0.020" | Rockwell C35 | ASME B18.21.1; MS35338-134 | 100 | 000000000 | 0000 |
| No. 4 | 0.114" | 0.209" | 0.025" | Rockwell C35 | ASME B18.21.1; MS35338-135 | 100 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.250" | 0.031" | Rockwell C35 | ASME B18.21.1; MS35338-136 | 100 | 000000000 | 0000 |
| No. 8 | 0.167" | 0.293" | 0.040" | Rockwell C35 | ASME B18.21.1; MS35338-137 | 100 | 000000000 | 0000 |
| No. 10 | 0.193" | 0.334" | 0.047" | Rockwell C35 | ASME B18.21.1; MS35338-138 | 100 | 000000000 | 0000 |
| 1/4" | 0.252" | 0.487" | 0.062" | Rockwell C35 | ASME B18.21.1; MS35338-139 | 50 | 000000000 | 0000 |
Passivated 18-8 Stainless Steel | ||||||||
MS35338 | ||||||||
| 5/16" | 0.322" | 0.583" | 0.078" | Rockwell C35 | ASME B18.21.1; MS35338-140 | 25 | 000000000 | 0000 |
| 3/8" | 0.385" | 0.680" | 0.094" | Rockwell C35 | ASME B18.21.1; MS35338-141 | 25 | 000000000 | 0000 |
| 7/16" | 0.440" | 0.776" | 0.109" | Rockwell C35 | ASME B18.21.1; MS35338-142 | 10 | 000000000 | 0000 |
| 1/2" | 0.512" | 0.869" | 0.125" | Rockwell C35 | ASME B18.21.1; MS35338-143 | 10 | 000000000 | 0000 |
| 9/16" | 0.564" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1; MS35338-144 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.072" | 0.156" | Rockwell C35 | ASME B18.21.1; MS35338-145 | 10 | 000000000 | 00000 |
| 3/4" | 0.766" | 1.264" | 0.188" | Rockwell C35 | ASME B18.21.1; MS35338-146 | 5 | 000000000 | 00000 |
| 1" | 1.003" | 1.656" | 0.250" | Rockwell C35 | ASME B18.21.1; MS35338-148 | 2 | 000000000 | 0000 |
| 1 1/4" | 1.254" | 2.036" | 0.312" | Rockwell C35 | ASME B18.21.1; MS35338-150 | 1 | 000000000 | 0000 |
| 1 1/8" | 1.129" | 1.847" | 0.281" | Rockwell C35 | ASME B18.21.1; MS35338-149 | 1 | 000000000 | 0000 |
Black Oxide 18-8 Stainless Steel | ||||||||
MS35338 | ||||||||
| 5/16" | 0.314" | 0.583" | 0.078" | Rockwell C35 | ASME B18.21.1; MS35338-140 | 50 | 000000000 | 0000 |
| 3/8" | 0.377" | 0.680" | 0.094" | Rockwell C35 | ASME B18.21.1; MS35338-141 | 10 | 000000000 | 0000 |
| 7/16" | 0.440" | 0.776" | 0.109" | Rockwell C35 | ASME B18.21.1; MS35338-142 | 10 | 000000000 | 0000 |
| 1/2" | 0.502" | 0.869" | 0.125" | Rockwell C35 | ASME B18.21.1; MS35338-143 | 10 | 000000000 | 0000 |
| 9/16" | 0.564" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1; MS35338-144 | 2 | 000000000 | 0000 |
| 5/8" | 0.628" | 1.073" | 0.156" | Rockwell C35 | ASME B18.21.1; MS35338-145 | 2 | 000000000 | 0000 |
Cadmium-Plated Steel | ||||||||
MS35338 | ||||||||
| No. 2 | 0.094" | 0.172" | 0.020" | Rockwell C38 | ASME B18.21.1; MS35338-39 | 50 | 000000000 | 0000 |
| No. 4 | 0.114" | 0.209" | 0.025" | Rockwell C38 | ASME B18.21.1; MS35338-40 | 50 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.250" | 0.031" | Rockwell C38 | ASME B18.21.1; MS35338-41 | 50 | 000000000 | 0000 |
| No. 8 | 0.167" | 0.293" | 0.040" | Rockwell C38 | ASME B18.21.1; MS35338-42 | 50 | 000000000 | 0000 |
| No. 10 | 0.193" | 0.334" | 0.047" | Rockwell C38 | ASME B18.21.1; MS35338-43 | 50 | 000000000 | 0000 |
| 1/4" | 0.252" | 0.487" | 0.062" | Rockwell C38 | ASME B18.21.1; MS35338-44 | 50 | 000000000 | 0000 |
| 5/16" | 0.314" | 0.583" | 0.078" | Rockwell C38 | ASME B18.21.1; MS35338-45 | 50 | 000000000 | 0000 |
| 3/8" | 0.377" | 0.680" | 0.094" | Rockwell C38 | ASME B18.21.1; MS35338-46 | 25 | 000000000 | 0000 |
| 7/16" | 0.440" | 0.776" | 0.109" | Rockwell C38 | ASME B18.21.1; MS35338-47 | 25 | 000000000 | 0000 |
| 1/2" | 0.502" | 0.869" | 0.125" | Rockwell C38 | ASME B18.21.1; MS35338-48 | 10 | 000000000 | 0000 |
| 9/16" | 0.564" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1; MS35338-49 | 5 | 000000000 | 0000 |
| 5/8" | 0.628" | 1.073" | 0.156" | Rockwell C38 | ASME B18.21.1; MS35338-50 | 2 | 000000000 | 0000 |
Zinc Yellow-Chromate Plated Steel | ||||||||
MS35338 | ||||||||
| No. 2 | 0.094" | 0.172" | 0.020" | Rockwell C38 | ASME B18.21.1; MS35338-39 | 100 | 000000000 | 0000 |
| No. 4 | 0.114" | 0.209" | 0.025" | Rockwell C38 | ASME B18.21.1; MS35338-40 | 100 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.250" | 0.031" | Rockwell C38 | ASME B18.21.1; MS35338-41 | 100 | 000000000 | 0000 |
| No. 8 | 0.167" | 0.293" | 0.040" | Rockwell C38 | ASME B18.21.1; MS35338-42 | 100 | 000000000 | 0000 |
| No. 10 | 0.193" | 0.334" | 0.047" | Rockwell C38 | ASME B18.21.1; MS35338-43 | 100 | 000000000 | 0000 |
| 1/4" | 0.252" | 0.487" | 0.062" | Rockwell C38 | ASME B18.21.1; MS35338-44 | 50 | 000000000 | 0000 |
| 5/16" | 0.314" | 0.583" | 0.078" | Rockwell C38 | ASME B18.21.1; MS35338-45 | 50 | 000000000 | 0000 |
| 3/8" | 0.377" | 0.680" | 0.094" | Rockwell C38 | ASME B18.21.1; MS35338-46 | 25 | 000000000 | 0000 |
| 7/16" | 0.440" | 0.776" | 0.109" | Rockwell C38 | ASME B18.21.1; MS35338-47 | 25 | 000000000 | 0000 |
| 1/2" | 0.502" | 0.869" | 0.125" | Rockwell C38 | ASME B18.21.1; MS35338-48 | 10 | 000000000 | 0000 |
| 9/16" | 0.564" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1; MS35338-49 | 10 | 000000000 | 0000 |
| 5/8" | 0.628" | 1.073" | 0.156" | Rockwell C38 | ASME B18.21.1; MS35338-50 | 10 | 000000000 | 0000 |
| 7/8" | 0.878" | 1.459" | 0.219" | Rockwell C38 | ASME B18.21.1; MS35338-52 | 5 | 000000000 | 0000 |
| 1" | 1.003" | 1.656" | 0.250" | Rockwell C38 | ASME B18.21.1; MS35338-53 | 3 | 000000000 | 0000 |
| 1 1/2" | 1.504" | 2.419" | 0.375" | Rockwell C38 | ASME B18.21.1; MS35338-57 | 1 | 000000000 | 0000 |
| 1 1/4" | 1.254" | 2.036" | 0.312" | Rockwell C38 | ASME B18.21.1; MS35338-55 | 2 | 000000000 | 0000 |
| 1 1/8" | 1.129" | 1.847" | 0.281" | Rockwell C38 | ASME B18.21.1; MS35338-54 | 3 | 000000000 | 0000 |
| 1 3/8" | 1.397" | 2.219" | 0.344" | Rockwell C38 | ASME B18.21.1; MS35338-56 | 2 | 000000000 | 0000 |
Mil. Spec. External-Tooth Lock Washers
Choose these washers for their adherence to strict military standards for material and construction. Teeth on the outside edge of the washer bite into the screw head and joint for a tight grip. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.
410 stainless steel washers have excellent wear resistance.
Zinc-plated steel washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
410 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
MS-35335/NASM 35335 | ||||||||
| No. 4 | 0.115" | 0.260" | 0.015"-0.019" | Rockwell C40 | ASME B18.21.1; MS35335-57; NASM35335 | 25 | 000000000 | 000000 |
| No. 6 | 0.141" | 0.320" | 0.016"-0.022" | Rockwell C40 | ASME B18.21.1; MS35335-58; NASM35335 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.381" | 0.018"-0.023" | Rockwell C40 | ASME B18.21.1; MS35335-59; NASM35335 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-60; NASM35335 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Rockwell C40 | ASME B18.21.1; MS35335-61; NASM35335 | 25 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C40 | ASME B18.21.1; MS35335-62; NASM35335 | 25 | 000000000 | 00000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-63; NASM35335 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.760" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-64; NASM35335 | 25 | 000000000 | 00000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-65; NASM35335 | 10 | 000000000 | 0000 |
| 9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-66; NASM35335 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.070" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1; MS35335-67; NASM35335 | 5 | 000000000 | 0000 |
| 3/4" | 0.768" | 1.260" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1; MS35335-68; NASM35335 | 5 | 000000000 | 0000 |
| 7/8" | 0.897" | 1.410" | 0.052"-0.060" | Rockwell C40 | ASME B18.21.1; MS35335-69; NASM35335 | 1 | 000000000 | 0000 |
| 1" | 1.025" | 1.620" | 0.059"-0.067" | Rockwell C40 | ASME B18.21.1; MS35335-70; NASM35335 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
MS-35335/NASM 35335 | ||||||||
| No. 4 | 0.115" | 0.260" | 0.015"-0.019" | Rockwell C40 | ASME B18.21.1; MS35335-29; NASM35335 | 100 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.320" | 0.016"-0.022" | Rockwell C40 | ASME B18.21.1; MS35335-30; NASM35335 | 100 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.381" | 0.018"-0.023" | Rockwell C40 | ASME B18.21.1; MS35335-31; NASM35335 | 100 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-32; NASM35335 | 100 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Rockwell C40 | ASME B18.21.1; MS35335-33; NASM35335 | 100 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C40 | ASME B18.21.1; MS35335-34; NASM35335 | 50 | 000000000 | 00000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-35; NASM35335 | 50 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.760" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-36; NASM35335 | 25 | 000000000 | 00000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-37; NASM35335 | 25 | 000000000 | 00000 |
| 9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-38; NASM35335 | 25 | 000000000 | 00000 |
| 5/8" | 0.641" | 1.070" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1; MS35335-39; NASM35335 | 10 | 000000000 | 0000 |
| 3/4" | 0.768" | 1.260" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1; MS35335-40; NASM35335 | 10 | 000000000 | 0000 |
| 7/8" | 0.897" | 1.410" | 0.052"-0.060" | Rockwell C40 | ASME B18.21.1; MS35335-41; NASM35335 | 10 | 000000000 | 0000 |
| 1" | 1.025" | 1.620" | 0.059"-0.067" | Rockwell C40 | ASME B18.21.1; MS35335-42; NASM35335 | 5 | 000000000 | 0000 |
Bronze | ||||||||
MS-35335/NASM 35335 | ||||||||
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Not Rated | ASME B18.21.1; MS35335-88; NASM35335 | 25 | 000000000 | 0000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Not Rated | ASME B18.21.1; MS35335-89; NASM35335 | 10 | 000000000 | 0000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1; MS35335-90; NASM35335 | 10 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Not Rated | ASME B18.21.1; MS35335-91; NASM35335 | 10 | 000000000 | 0000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Not Rated | ASME B18.21.1; MS35335-93; NASM35335 | 10 | 000000000 | 0000 |
Mil. Spec. Internal-Tooth Lock Washers
Choose these washers for their adherence to strict military standards for material and construction. Internal teeth dig into the screw head while the smooth outside edge won't snag objects. These washers provide greater vibration resistance than split lock washers. Use with fasteners that have small heads, such as fillister and cheese head screws.
Cadmium-plated steel washers are corrosion resistant in wet environments.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
410 stainless steel washers have excellent wear resistance.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell C40-50 | ASME B18.21.1; MS35333-35; NASM35333 | 25 | 000000000 | 00000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell C40-50 | ASME B18.21.1; MS35333-36; NASM35333 | 25 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell C40-50 | ASME B18.21.1; MS35333-37; NASM35333 | 25 | 000000000 | 0000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C40-50 | ASME B18.21.1; MS35333-38; NASM35333 | 25 | 000000000 | 0000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-39; NASM35333 | 25 | 000000000 | 0000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C40-50 | ASME B18.21.1; MS35333-40; NASM35333 | 25 | 000000000 | 0000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell C40-50 | ASME B18.21.1; MS35333-41; NASM35333 | 25 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-42; NASM35333 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-43; NASM35333 | 25 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C40-50 | ASME B18.21.1; MS35333-44; NASM35333 | 25 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C40-50 | ASME B18.21.1; MS35333-46; NASM35333 | 10 | 000000000 | 0000 |
| 3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C40-50 | ASME B18.21.1; MS35333-47; NASM35333 | 10 | 000000000 | 0000 |
| 7/8" | 0.894" | 1.410" | 0.052"-0.060" | Rockwell C40-50 | ASME B18.21.1; MS35333-48; NASM35333 | 10 | 000000000 | 00000 |
| 1" | 1.019" | 1.637" | 0.059"-0.067" | Rockwell C40-50 | ASME B18.21.1; MS35333-49; NASM35333 | 5 | 000000000 | 0000 |
| 1 1/4" | 1.260" | 1.950" | 0.059"-0.067" | Rockwell C40-50 | ASME B18.21.1; MS35333-51; NASM35333 | 5 | 000000000 | 0000 |
Bronze | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell B90 | ASME B18.21.1; MS35333-103; NASM35333 | 25 | 000000000 | 0000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell B90 | ASME B18.21.1; MS35333-104; NASM35333 | 25 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell B90 | ASME B18.21.1; MS35333-105; NASM35333 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell B90 | ASME B18.21.1; MS35333-106; NASM35333 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell B90 | ASME B18.21.1; MS35333-107; NASM35333 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell B90 | ASME B18.21.1; MS35333-108; NASM35333 | 25 | 000000000 | 00000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell B90 | ASME B18.21.1; MS35333-109; NASM35333 | 10 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell B90 | ASME B18.21.1; MS35333-110; NASM35333 | 10 | 000000000 | 0000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell B90 | ASME B18.21.1; MS35333-113; NASM35333 | 5 | 000000000 | 0000 |
| 5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell B90 | ASME B18.21.1; MS35333-115; NASM35333 | 1 | 000000000 | 0000 |
| 3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell B90 | ASME B18.21.1; MS35333-116; NASM35333 | 1 | 000000000 | 0000 |
410 Stainless Steel | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell C40-50 | ASME B18.21.1; MS35333-69; NASM35333 | 25 | 000000000 | 0000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell C40-50 | ASME B18.21.1; MS35333-70; NASM35333 | 25 | 000000000 | 00000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell C40-50 | ASME B18.21.1; MS35333-71; NASM35333 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C40-50 | ASME B18.21.1; MS35333-72; NASM35333 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-73; NASM35333 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C40-50 | ASME B18.21.1; MS35333-74; NASM35333 | 25 | 000000000 | 00000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell C40-50 | ASME B18.21.1; MS35333-75; NASM35333 | 25 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-76; NASM35333 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-77; NASM35333 | 25 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C40-50 | ASME B18.21.1; MS35333-78; NASM35333 | 10 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C40-50 | ASME B18.21.1; MS35333-80; NASM35333 | 10 | 000000000 | 00000 |
| 3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C40-50 | ASME B18.21.1; MS35333-81; NASM35333 | 5 | 000000000 | 00000 |
| 7/8" | 0.894" | 1.410" | 0.052"-0.060" | Rockwell C40-50 | ASME B18.21.1; MS35333-82; NASM35333 | 5 | 000000000 | 00000 |
Mil. Spec. Belleville Disc Springs
These stainless steel springs meet MIL-W-12133 and are more corrosion resistant than steel springs. They’re used on shafts, bolts, and the ends of valves to maintain tension and separate components. Unlike Belleville washers, they return to their original height once the load is removed.
Deflection is the distance a spring compresses under load. Flat load is the load at which the spring is completely compressed.
Springs may be stacked to increase working load and deflection. In a nested stack, working load is multiplied by the number of springs used, while deflection remains unchanged. In an inverted stack, deflection is multiplied by the number of springs used, while the working load remains unchanged. In a nested and inverted stack, both load and deflection are increased.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | ID | OD | Thick. | Ht. | Compressed Ht. @ Working Load | Deflection @ Working Load | Working Load, lbs. | Flat Load, lbs. | Material | Specifications Met | Pkg. Qty. | Pkg. | |
| 3/32" | 0.093" | 0.187" | 0.01" | 0.015" | 0.013" | 0.002" | 16 | 27 | 17-7 PH Stainless Steel | MIL-W-12133-93 | 12 | 0000000 | 00000 |
| 1/8" | 0.125" | 0.25" | 0.013" | 0.02" | 0.017" | 0.003" | 24 | 45 | 17-7 PH Stainless Steel | MIL-W-12133-125 | 12 | 0000000 | 0000 |
| 5/32" | 0.156" | 0.312" | 0.017" | 0.025" | 0.021" | 0.004" | 41 | 77 | 17-7 PH Stainless Steel | MIL-W-12133-156 | 12 | 0000000 | 0000 |
| 3/16" | 0.19" | 0.375" | 0.015" | 0.027" | 0.021" | 0.006" | 39 | 55 | 17-7 PH Stainless Steel | MIL-W-12133-200 | 12 | 0000000 | 0000 |
| 3/16" | 0.19" | 0.375" | 0.02" | 0.03" | 0.025" | 0.005" | 61 | 110 | 17-7 PH Stainless Steel | MIL-W-12133-190 | 12 | 0000000 | 0000 |
| 1/4" | 0.255" | 0.5" | 0.025" | 0.038" | 0.031" | 0.007" | 94 | 157 | 17-7 PH Stainless Steel | MIL-W-12133-255 | 12 | 0000000 | 0000 |
| 5/16" | 0.317" | 0.625" | 0.022" | 0.042" | 0.032" | 0.01" | 70 | 104 | 17-7 PH Stainless Steel | MIL-W-12133-400 | 12 | 0000000 | 00000 |
| 5/16" | 0.317" | 0.625" | 0.032" | 0.048" | 0.04" | 0.008" | 149 | 259 | 17-7 PH Stainless Steel | MIL-W-12133-317 | 12 | 0000000 | 00000 |
| 3/8" | 0.38" | 0.75" | 0.04" | 0.059" | 0.049" | 0.01" | 245 | 418 | 17-7 PH Stainless Steel | MIL-W-12133-380 | 12 | 0000000 | 00000 |
| 1/2" | 0.505" | 1" | 0.05" | 0.075" | 0.062" | 0.013" | 368 | 596 | 17-7 PH Stainless Steel | MIL-W-12133-505 | 6 | 0000000 | 0000 |
| 9/16" | 0.567" | 1.125" | 0.056" | 0.084" | 0.07" | 0.014" | 436 | 745 | 17-7 PH Stainless Steel | MIL-W-12133-567 | 3 | 0000000 | 0000 |
| 5/8" | 0.63" | 1.25" | 0.062" | 0.092" | 0.077" | 0.015" | 511 | 876 | 17-7 PH Stainless Steel | MIL-W-12133-630 | 3 | 0000000 | 00000 |
| 3/4" | 0.755" | 1.5" | 0.045" | 0.093" | 0.069" | 0.024" | 270 | 367 | 17-7 PH Stainless Steel | MIL-W-12133-755 | 3 | 0000000 | 00000 |
| 1" | 1" | 2" | 0.065" | 0.13" | 0.098" | 0.032" | 599 | 842 | 17-7 PH Stainless Steel | MIL-W-12133-100 | 1 | 0000000 | 0000 |
| 1 1/4" | 1.25" | 2.5" | 0.125" | 0.18" | 0.15" | 0.03" | 1,922 | 3,268 | 17-7 PH Stainless Steel | MIL-W-12133-900 | 1 | 0000000 | 00000 |