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Internal-Tooth Lock Washers
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.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
400 series stainless steel washers have excellent wear resistance, but aren’t as corrosion resistant as other stainless steel washers. They may be mildly magnetic.
Zinc-plated steel washers are corrosion resistant in wet environments.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards. The zinc-plated steel washers also meet standards for material properties.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thickness | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|
No. 4 | 0.115" | 0.270" | 0.012"-0.018" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
No. 6 | 0.141" | 0.295" | 0.016"-0.022" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
1/4" | 0.256" | 0.478" | 0.023"-0.028" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
5/16" | 0.320" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
3/8" | 0.384" | 0.692" | 0.032"-0.040" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
1/2" | 0.530" | 0.867" | 0.037"-0.045" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 0000 |
18-8 Stainless Steel | ||||||||
No. 4 | 0.115" | 0.270" | 0.012"-0.018" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 6 | 0.141" | 0.295" | 0.016"-0.022" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 12 | 0.231" | 0.410" | 0.020"-0.027" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
1/4" | 0.256" | 0.478" | 0.023"-0.028" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
5/16" | 0.320" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1 | 50 | 000000000 | 0000 |
3/8" | 0.384" | 0.692" | 0.032"-0.040" | Not Rated | ASME B18.21.1 | 25 | 000000000 | 0000 |
1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1 | 10 | 000000000 | 0000 |
9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1 | 10 | 000000000 | 0000 |
5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1 | 10 | 000000000 | 0000 |
3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1 | 5 | 000000000 | 0000 |
400 Series Stainless Steel | ||||||||
No. 2 | 0.089" | 0.200" | 0.010"-0.016" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 2 | 0.095" | 0.200" | 0.010"-0.016" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 3 | 0.102" | 0.232" | 0.010"-0.016" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 4 | 0.115" | 0.270" | 0.012"-0.018" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 4 | 0.123" | 0.270" | 0.012"-0.018" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 5 | 0.136" | 0.280" | 0.014"-0.020" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 5 | 0.136" | 0.280" | 0.014"-0.020" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 6 | 0.141" | 0.295" | 0.016"-0.022" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 6 | 0.150" | 0.295" | 0.016"-0.022" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 9 | 0.176" | 0.340" | 0.018"-0.023" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 10 | 0.204" | 0.381" | 0.018"-0.024" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
No. 12 | 0.221" | 0.410" | 0.020"-0.027" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
1/4" | 0.267" | 0.478" | 0.023"-0.028" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 00000 |
1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C34 | ASME B18.21.1 | 50 | 000000000 | 0000 |
9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C34 | ASME B18.21.1 | 50 | 000000000 | 00000 |
5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C34 | ASME B18.21.1 | 25 | 000000000 | 00000 |
3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C34 | ASME B18.21.1 | 25 | 000000000 | 00000 |
7/8" | 0.927" | 1.410" | 0.052"-0.060" | Rockwell C34 | ASME B18.21.1 | 5 | 000000000 | 0000 |
1" | 1.060" | 1.640" | 0.059"-0.067" | Rockwell C34 | ASME B18.21.1 | 5 | 000000000 | 0000 |
Zinc-Plated Grade 8 Steel | ||||||||
1/4" | 0.256" | 0.536" | 0.034"-0.044" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 00000 |
5/16" | 0.320" | 0.607" | 0.040"-0.050" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 00000 |
3/8" | 0.384" | 0.747" | 0.040"-0.050" | Rockwell C44 | ASME B18.21.1 | 25 | 000000000 | 00000 |
1/2" | 0.512" | 0.923" | 0.054"-0.070" | Rockwell C44 | ASME B18.21.1 | 10 | 000000000 | 00000 |
5/8" | 0.640" | 1.134" | 0.054"-0.070" | Rockwell C44 | ASME B18.21.1 | 5 | 000000000 | 00000 |
3/4" | 0.768" | 1.260" | 0.073"-0.083" | Rockwell C44 | ASME B18.21.1 | 5 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
No. 2 | 0.089" | 0.200" | 0.010"-0.016" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 3 | 0.102" | 0.232" | 0.010"-0.016" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 4 | 0.115" | 0.270" | 0.012"-0.018" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 5 | 0.129" | 0.280" | 0.014"-0.020" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 6 | 0.141" | 0.295" | 0.016"-0.022" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 00000 |
No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 00000 |
No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 12 | 0.221" | 0.410" | 0.020"-0.027" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 00000 |
5/16" | 0.320" | 0.607" | 0.028"-0.034" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 0000 |
3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 0000 |
7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 0000 |
1/2" | 0.512" | 0.883" | 0.037"-0.045" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 0000 |
9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 00000 |
5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 00000 |
3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C44 | ASME B18.21.1 | 25 | 000000000 | 00000 |
7/8" | 0.894" | 1.410" | 0.052"-0.060" | Rockwell C44 | ASME B18.21.1 | 25 | 000000000 | 00000 |
1" | 1.019" | 1.637" | 0.059"-0.067" | Rockwell C44 | ASME B18.21.1 | 10 | 000000000 | 00000 |
1 1/8" | 1.144" | 1.830" | 0.059"-0.067" | Rockwell C44 | ASME B18.21.1 | 10 | 000000000 | 00000 |
1 1/4" | 1.275" | 1.975" | 0.059"-0.067" | Rockwell C44 | ASME B18.21.1 | 5 | 000000000 | 00000 |
1 3/8" | 1.394" | 1.950" | 0.060"-0.064" | Rockwell C44 | __ | 1 | 000000000 | 0000 |
1 1/2" | 1.500" | 2.515" | 0.076"-0.080" | Rockwell C44 | __ | 1 | 000000000 | 0000 |
Bronze | ||||||||
No. 2 | 0.089" | 0.200" | 0.010"-0.016" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 3 | 0.109" | 0.232" | 0.010"-0.016" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 4 | 0.115" | 0.270" | 0.012"-0.018" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 5 | 0.136" | 0.280" | 0.014"-0.018" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 6 | 0.141" | 0.295" | 0.016"-0.022" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
No. 12 | 0.231" | 0.410" | 0.020"-0.027" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 00000 |