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Specifications Met Specifications Met |
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System of Measurement System of Measurement |
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For Screw Size For Screw Size |
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Material Material |
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Finish Finish |
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Thickness Thickness |
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OD OD |
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Washer Type Washer Type |
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 | Flat |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Hardness Hardness |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Washers
More
Mil. Spec. Washers
Choose these washers for their adherence to strict military standards for material and construction.
18-8 stainless steel and 321 stainless steel washers have excellent corrosion resistance in most environments. They may be mildly magnetic. Passivated 18-8 stainless steel washers have added protection against oxidation and corrosion. Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
Aluminum washers are lightweight and have good corrosion resistance. 2024 aluminum washers are easy to machine. They are stronger and resist wear better than 1100 aluminum. They are commonly used in the aircraft industry and in veterinary and orthopedic equipment. Yellow-chromate plated 2024 aluminum washers are more corrosion resistant than 2024 aluminum with no finish.
Copper and brass 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. | |
Passivated 18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
NAS1149 | ||||||||
| No. 2 | 0.099" | 0.250" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN216R | 500 | 000000000 | 000000 |
| No. 2 | 0.099" | 0.250" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN232R | 500 | 000000000 | 00000 |
| No. 3 | 0.105" | 0.250" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN316R | 500 | 000000000 | 00000 |
| No. 3 | 0.105" | 0.250" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN332R | 500 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.312" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN416R | 500 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.312" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN432R; ASME B18.21.1 | 500 | 000000000 | 00000 |
| No. 6 | 0.149" | 0.375" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN616R | 500 | 000000000 | 00000 |
| No. 6 | 0.149" | 0.375" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN632R | 500 | 000000000 | 00000 |
| No. 8 | 0.174" | 0.375" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN816R | 500 | 000000000 | 00000 |
| No. 8 | 0.174" | 0.375" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN832R | 500 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0332R | 250 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0363R | 250 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.500" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0432R | 250 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.500" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0463R | 100 | 000000000 | 00000 |
| 5/16" | 0.328" | 0.562" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0532R | 100 | 000000000 | 00000 |
| 5/16" | 0.328" | 0.562" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0563R | 100 | 000000000 | 00000 |
| 3/8" | 0.390" | 0.625" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0632R | 100 | 000000000 | 00000 |
| 3/8" | 0.390" | 0.625" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0663R | 100 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0732R | 100 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0763R | 25 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0832R | 100 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0863R | 50 | 000000000 | 00000 |
| 9/16" | 0.578" | 1.062" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0963R | 25 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.188" | 0.057"-0.069" | Rockwell B70 | NAS1149-C1063R | 25 | 000000000 | 00000 |
| 3/4" | 0.765" | 1.312" | 0.082"-0.098" | Rockwell B70 | NAS1149-C1290R | 10 | 000000000 | 00000 |
| 7/8" | 0.890" | 1.500" | 0.082"-0.098" | Rockwell B70 | NAS1149-C1490R | 10 | 000000000 | 00000 |
| 1" | 1.015" | 1.750" | 0.082"-0.098" | Rockwell B70 | NAS1149-C1690R | 5 | 000000000 | 00000 |
Cadmium-Plated Steel | ||||||||
NAS1149 | ||||||||
| No. 2 | 0.099" | 0.250" | 0.029"-0.035" | Not Rated | NAS1149-FN232P | 100 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.014"-0.018" | Not Rated | NAS1149-FN416P | 100 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.029"-0.035" | Not Rated | NAS1149-FN432P; ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 6 | 0.149" | 0.375" | 0.014"-0.018" | Not Rated | NAS1149-FN616P | 100 | 000000000 | 0000 |
| No. 6 | 0.149" | 0.375" | 0.029"-0.035" | Not Rated | NAS1149-FN632P | 100 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.375" | 0.014"-0.018" | Not Rated | NAS1149-FN816P | 100 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.375" | 0.029"-0.035" | Not Rated | NAS1149-FN832P | 100 | 000000000 | 0000 |
| No. 10 | 0.203" | 0.438" | 0.029"-0.035" | Not Rated | NAS1149-F0332P | 100 | 000000000 | 0000 |
| No. 10 | 0.203" | 0.438" | 0.059"-0.067" | Not Rated | NAS1149-F0363P | 100 | 000000000 | 0000 |
| 1/4" | 0.265" | 0.500" | 0.029"-0.035" | Not Rated | NAS1149-F0432P | 100 | 000000000 | 0000 |
| 1/4" | 0.265" | 0.500" | 0.059"-0.067" | Not Rated | NAS1149-F0463P | 100 | 000000000 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.029"-0.035" | Not Rated | NAS1149-F0532P | 100 | 000000000 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.059"-0.067" | Not Rated | NAS1149-F0563P | 100 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.029"-0.035" | Not Rated | NAS1149-F0632P | 100 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.059"-0.067" | Not Rated | NAS1149-F0663P | 100 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.029"-0.035" | Not Rated | NAS1149-F0732P | 100 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.059"-0.067" | Not Rated | NAS1149-F0763P | 100 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.029"-0.035" | Not Rated | NAS1149-F0832P | 100 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.059"-0.067" | Not Rated | NAS1149-F0863P | 100 | 000000000 | 00000 |
| 9/16" | 0.578" | 1.062" | 0.059"-0.067" | Not Rated | NAS1149-F0963P | 50 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.188" | 0.029"-0.035" | Not Rated | NAS1149-F1032P | 50 | 000000000 | 0000 |
| 5/8" | 0.640" | 1.188" | 0.059"-0.067" | Not Rated | NAS1149-F1063P | 50 | 000000000 | 00000 |
2024 Aluminum | ||||||||
NAS1149 | ||||||||
| No. 0 | 0.068" | 0.188" | 0.013"-0.019" | Not Rated | NAS1149-DN016H | 25 | 000000000 | 00000 |
| No. 0 | 0.068" | 0.188" | 0.028"-0.036" | Not Rated | NAS1149-DN032H | 25 | 000000000 | 00000 |
| No. 2 | 0.099" | 0.250" | 0.013"-0.019" | Not Rated | NAS1149-DN216H | 100 | 000000000 | 00000 |
| No. 2 | 0.099" | 0.250" | 0.028"-0.036" | Not Rated | NAS1149-DN232H | 100 | 000000000 | 00000 |
| No. 3 | 0.105" | 0.250" | 0.013"-0.019" | Not Rated | NAS1149-DN316H | 100 | 000000000 | 00000 |
| No. 3 | 0.105" | 0.250" | 0.028"-0.036" | Not Rated | NAS1149-DN332H | 100 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.312" | 0.013"-0.019" | Not Rated | NAS1149-DN416H | 100 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.312" | 0.028"-0.036" | Not Rated | NAS1149-DN432H | 100 | 000000000 | 00000 |
| No. 5 | 0.140" | 0.438" | 0.013"-0.019" | Not Rated | NAS1149-DN516H | 100 | 000000000 | 00000 |
| No. 5 | 0.140" | 0.438" | 0.028"-0.036" | Not Rated | NAS1149-DN532H | 100 | 000000000 | 00000 |
| No. 6 | 0.149" | 0.375" | 0.013"-0.019" | Not Rated | NAS1149-DN616H | 100 | 000000000 | 00000 |
| No. 6 | 0.149" | 0.375" | 0.028"-0.036" | Not Rated | NAS1149-DN632H | 100 | 000000000 | 00000 |
| No. 8 | 0.174" | 0.375" | 0.013"-0.019" | Not Rated | NAS1149-DN816H | 100 | 000000000 | 00000 |
| No. 8 | 0.174" | 0.375" | 0.028"-0.036" | Not Rated | NAS1149-DN832H | 100 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.013"-0.019" | Not Rated | NAS1149-D0316H | 100 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.028"-0.036" | Not Rated | NAS1149-D0332H | 100 | 000000000 | 00000 |
| No. 10 | 0.203" | 0.438" | 0.057"-0.069" | Not Rated | NAS1149-D0363H | 50 | 000000000 | 0000 |
| No. 12 | 0.234" | 0.625" | 0.059"-0.071" | Not Rated | NAS1149-D1165H | 50 | 000000000 | 00000 |
| 1/4" | 0.265" | 0.500" | 0.013"-0.019" | Not Rated | NAS1149-D0416H | 50 | 000000000 | 0000 |
| 1/4" | 0.265" | 0.500" | 0.028"-0.036" | Not Rated | NAS1149-D0432H | 50 | 000000000 | 0000 |
| 1/4" | 0.265" | 0.500" | 0.057"-0.069" | Not Rated | NAS1149-D0463H | 50 | 000000000 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.013"-0.019" | Not Rated | NAS1149-D0516H | 50 | 000000000 | 00000 |
| 5/16" | 0.328" | 0.562" | 0.028"-0.036" | Not Rated | NAS1149-D0532H | 50 | 000000000 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.057"-0.069" | Not Rated | NAS1149-D0563H | 50 | 000000000 | 00000 |
| 3/8" | 0.390" | 0.625" | 0.013"-0.019" | Not Rated | NAS1149-D0616H | 50 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.028"-0.036" | Not Rated | NAS1149-D0632H | 50 | 000000000 | 00000 |
| 3/8" | 0.390" | 0.625" | 0.057"-0.069" | Not Rated | NAS1149-D0663H | 50 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.013"-0.019" | Not Rated | NAS1149-D0716H | 50 | 000000000 | 0000 |
| 7/16" | 0.453" | 0.750" | 0.028"-0.036" | Not Rated | NAS1149-D0732H | 50 | 000000000 | 00000 |
| 7/16" | 0.453" | 0.750" | 0.057"-0.069" | Not Rated | NAS1149-D0763H | 50 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.013"-0.019" | Not Rated | NAS1149-D0816H | 25 | 000000000 | 0000 |
| 1/2" | 0.515" | 0.875" | 0.028"-0.036" | Not Rated | NAS1149-D0832H | 50 | 000000000 | 00000 |
| 1/2" | 0.515" | 0.875" | 0.057"-0.069" | Not Rated | NAS1149-D0863H | 25 | 000000000 | 00000 |