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External-Tooth Lock Washers
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.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards.
For technical drawings and 3-D models, click on a part number.
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.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID | OD | Thick. | Hardness | Specifications Met | Military 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 | MS35335 | 25 | 000000000 | 000000 |
| No. 6 | 0.141" | 0.320" | 0.016"-0.022" | Rockwell C40 | ASME B18.21.1; MS35335-58 | MS35335 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.381" | 0.018"-0.023" | Rockwell C40 | ASME B18.21.1; MS35335-59 | MS35335 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-60 | MS35335 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Rockwell C40 | ASME B18.21.1; MS35335-61 | MS35335 | 25 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C40 | ASME B18.21.1; MS35335-62 | MS35335 | 25 | 000000000 | 00000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-63 | MS35335 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.760" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-64 | MS35335 | 25 | 000000000 | 00000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-65 | MS35335 | 10 | 000000000 | 0000 |
| 9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-66 | MS35335 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.070" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1; MS35335-67 | MS35335 | 5 | 000000000 | 0000 |
| 3/4" | 0.768" | 1.260" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1; MS35335-68 | MS35335 | 5 | 000000000 | 0000 |
| 7/8" | 0.897" | 1.410" | 0.052"-0.060" | Rockwell C40 | ASME B18.21.1; MS35335-69 | MS35335 | 1 | 000000000 | 0000 |
| 1" | 1.025" | 1.620" | 0.059"-0.067" | Rockwell C40 | ASME B18.21.1; MS35335-70 | MS35335 | 1 | 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.
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. | |
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 | 00000 |
| 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 |
Internal-/External-Tooth Lock Washers
The combination of internal and external teeth boosts gripping power to maintain a tight hold and provide more vibration resistance than other tooth lock washers. Use with fasteners that have heads large enough to make contact with the external teeth, such as pan, button, and binding head screws.
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. | |
410 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 4 | 0.115" | 0.475" | 0.016"-0.021" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 00000 |
| No. 6 | 0.141" | 0.510" | 0.023"-0.028" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 8 | 0.168" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 10 | 0.195" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
| 1/4" | 0.256" | 0.760" | 0.032"-0.040" | Not Rated | ASME B18.21.1 | 50 | 000000000 | 0000 |
| 5/16" | 0.320" | 0.900" | 0.032"-0.040" | Not Rated | ASME B18.21.1 | 50 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.985" | 0.037"-0.045" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 0000 |
| 1/2" | 0.512" | 1.260" | 0.047"-0.055" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 0000 |