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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.
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 | 00000 |
| No. 2 | 0.099" | 0.250" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN232R | 500 | 000000000 | 0000 |
| No. 3 | 0.105" | 0.250" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN316R | 500 | 000000000 | 0000 |
| No. 3 | 0.105" | 0.250" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN332R | 500 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN416R | 500 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.312" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN432R; ASME B18.21.1 | 500 | 000000000 | 0000 |
| No. 6 | 0.149" | 0.375" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN616R | 500 | 000000000 | 0000 |
| No. 6 | 0.149" | 0.375" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN632R | 500 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.375" | 0.014"-0.018" | Rockwell C25 | NAS1149-CN816R | 500 | 000000000 | 0000 |
| No. 8 | 0.174" | 0.375" | 0.028"-0.036" | Rockwell B70 | NAS1149-CN832R | 500 | 000000000 | 0000 |
| 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 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0532R | 100 | 000000000 | 0000 |
| 5/16" | 0.328" | 0.562" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0563R | 100 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0632R | 100 | 000000000 | 0000 |
| 3/8" | 0.390" | 0.625" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0663R | 100 | 000000000 | 0000 |
| 7/16" | 0.453" | 0.750" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0732R | 100 | 000000000 | 0000 |
| 7/16" | 0.453" | 0.750" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0763R | 25 | 000000000 | 0000 |
| 1/2" | 0.515" | 0.875" | 0.028"-0.036" | Rockwell B70 | NAS1149-C0832R | 100 | 000000000 | 0000 |
| 1/2" | 0.515" | 0.875" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0863R | 50 | 000000000 | 0000 |
| 9/16" | 0.578" | 1.062" | 0.057"-0.069" | Rockwell B70 | NAS1149-C0963R | 25 | 000000000 | 0000 |
| 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 | 0000 |
| 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 | 0000 |