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Tooth Lock Washers
External Tooth
 |
For Screw Size | ID | OD | Thk. | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| No. 2 | 0.086" | 0.189" | 0.010" to 0.013" | ASME B18.21.1 | 100 | 95584A311 | 00000 | ||
| No. 4 | 0.115" | 0.260" | 0.012" to 0.018" | ASME B18.21.1 | 100 | 95584A200 | 0000 | ||
| No. 6 | 0.141" | 0.320" | 0.016" to 0.022" | ASME B18.21.1 | 100 | 95584A201 | 0000 | ||
| No. 8 | 0.168" | 0.381" | 0.018" to 0.023" | ASME B18.21.1 | 100 | 95584A203 | 0000 | ||
| No. 10 | 0.195" | 0.410" | 0.018" to 0.024" | ASME B18.21.1 | 100 | 95584A205 | 0000 | ||
| No. 12 | 0.221" | 0.475" | 0.020" to 0.027" | ASME B18.21.1 | 100 | 95584A511 | 0000 | ||
| 1/4" | 0.256" | 0.510" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 95584A207 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 50 | 95584A209 | 0000 | ||
| 3/8" | 0.384" | 0.694" | 0.032" to 0.040" | ASME B18.21.1 | 25 | 95584A211 | 0000 | ||
| 1/2" | 0.513" | 0.900" | 0.037" to 0.045" | ASME B18.21.1 | 50 | 95584A512 | 0000 | ||
| 5/8" | 0.641" | 1.070" | 0.042" to 0.050" | ASME B18.21.1 | 10 | 95584A312 | 0000 | ||
| 3/4" | 0.768" | 1.260" | 0.047" to 0.055" | ASME B18.21.1 | 5 | 95584A313 | 0000 | ||
| M2 | 2.2 mm | 4.5 mm | 0.2 mm to 0.4 mm | DIN 6797 | 100 | 95060A510 | 0000 | ||
| M2 | 2.2 mm | 4.5 mm | 0.2 mm to 0.4 mm | DIN 6798 | 100 | 91120A311 | 0000 | ||
| M2.5 | 2.7 mm | 5.5 mm | 0.3 mm to 0.5 mm | DIN 6797 | 100 | 95060A520 | 0000 | ||
| M2.5 | 2.7 mm | 5.5 mm | 0.3 mm to 0.5 mm | DIN 6798 | 100 | 91120A312 | 0000 | ||
| M3 | 3.2 mm | 6.0 mm | 0.3 mm to 0.5 mm | DIN 6797 | 100 | 95060A320 | 0000 | ||
| M3 | 3.2 mm | 6.0 mm | 0.3 mm to 0.5 mm | DIN 6798 | 100 | 91120A120 | 0000 | ||
| M3.5 | 3.7 mm | 7.0 mm | 0.4 mm to 0.6 mm | DIN 6797 | 100 | 95060A530 | 0000 | ||
| M4 | 4.3 mm | 8.0 mm | 0.4 mm to 0.6 mm | DIN 6797 | 100 | 95060A330 | 0000 | ||
| M4 | 4.3 mm | 8.0 mm | 0.4 mm to 0.6 mm | DIN 6798 | 100 | 91120A130 | 0000 | ||
| M5 | 5.3 mm | 10.0 mm | 0.5 mm to 0.7 mm | DIN 6797 | 100 | 95060A350 | 0000 | ||
| M5 | 5.3 mm | 10.0 mm | 0.5 mm to 0.7 mm | DIN 6798 | 100 | 91120A140 | 0000 | ||
| M6 | 6.4 mm | 11.0 mm | 0.6 mm to 0.8 mm | DIN 6797 | 100 | 95060A360 | 0000 | ||
| M6 | 6.4 mm | 11.0 mm | 0.6 mm to 0.8 mm | DIN 6798 | 100 | 91120A160 | 0000 | ||
| M7 | 7.4 mm | 12.5 mm | 0.7 mm to 0.9 mm | DIN 6797 | 100 | 95060A460 | 0000 | ||
| M8 | 8.4 mm | 15.0 mm | 0.7 mm to 0.9 mm | DIN 6797 | 100 | 95060A390 | 0000 | ||
| M8 | 8.4 mm | 15.0 mm | 0.7 mm to 0.9 mm | DIN 6798 | 100 | 91120A180 | 0000 | ||
| M10 | 10.5 mm | 18.0 mm | 0.8 mm to 1.0 mm | DIN 6797 | 100 | 95060A400 | 0000 | ||
| M10 | 10.5 mm | 18.0 mm | 0.8 mm to 1.0 mm | DIN 6798 | 100 | 91120A200 | 00000 | ||
| M12 | 13.0 mm | 20.5 mm | 0.9 mm to 1.2 mm | DIN 6797 | 50 | 95060A411 | 0000 | ||
| M12 | 13.0 mm | 20.5 mm | 0.9 mm to 1.2 mm | DIN 6798 | 50 | 91120A211 | 0000 | ||
| M14 | 15.0 mm | 24.0 mm | 0.9 mm to 1.2 mm | DIN 6797 | 50 | 95060A420 | 0000 | ||
| M16 | 17.0 mm | 26.0 mm | 1.0 mm to 1.4 mm | DIN 6797 | 50 | 95060A540 | 00000 | ||
| M16 | 17.0 mm | 26.0 mm | 1.0 mm to 1.4 mm | DIN 6798 | 50 | 91120A235 | 00000 | ||
| M18 | 19.0 mm | 30.0 mm | 1.2 mm to 1.6 mm | DIN 6797 | 10 | 95060A440 | 0000 | ||
| M20 | 21.0 mm | 33.0 mm | 1.2 mm to 1.5 mm | DIN 6798 | 10 | 91120A241 | 0000 | ||
| M20 | 21.0 mm | 33.0 mm | 1.2 mm to 1.6 mm | DIN 6797 | 10 | 95060A450 | 0000 | ||
| M22 | 23.0 mm | 36.0 mm | 1.3 mm to 1.7 mm | DIN 6797 | 10 | 95060A470 | 0000 | ||
| M24 | 25.0 mm | 38.0 mm | 1.3 mm to 1.7 mm | DIN 6797 | 10 | 95060A480 | 0000 | ||
| M24 | 25.0 mm | 38.0 mm | 1.4 mm to 1.6 mm | DIN 6798 | 10 | 91120A245 | 0000 | ||
| M30 | 31.0 mm | 48.0 mm | 1.4 mm to 1.8 mm | DIN 6797 | 10 | 95060A500 | 00000 | ||
Black-Oxide 18-8 Stainless Steel | |||||||||
| No. 6 | 0.141" | 0.320" | 0.016" to 0.022" | ASME B18.21.1 | 100 | 95584A314 | 0000 | ||
| No. 8 | 0.168" | 0.381" | 0.018" to 0.023" | ASME B18.21.1 | 100 | 95584A315 | 0000 | ||
| No. 10 | 0.195" | 0.410" | 0.018" to 0.024" | ASME B18.21.1 | 100 | 95584A316 | 0000 | ||
| 1/4" | 0.256" | 0.510" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 95584A317 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 100 | 95584A318 | 0000 | ||
| 3/8" | 0.384" | 0.694" | 0.032" to 0.040" | ASME B18.21.1 | 100 | 95584A319 | 00000 | ||
Highly Corrosion-Resistant 316 Stainless Steel | |||||||||
| No. 4 | 0.115" | 0.260" | 0.012" to 0.018" | ASME B18.21.1 | 10 | 90375A005 | 0000 | ||
| No. 6 | 0.141" | 0.320" | 0.016" to 0.022" | ASME B18.21.1 | 10 | 90375A007 | 0000 | ||
| No. 8 | 0.168" | 0.381" | 0.018" to 0.023" | ASME B18.21.1 | 10 | 90375A009 | 0000 | ||
| No. 10 | 0.195" | 0.410" | 0.018" to 0.024" | ASME B18.21.1 | 10 | 90375A011 | 0000 | ||
| 1/4" | 0.256" | 0.510" | 0.023" to 0.028" | ASME B18.21.1 | 25 | 90375A110 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 25 | 90375A120 | 0000 | ||
| 3/8" | 0.384" | 0.694" | 0.032" to 0.040" | ASME B18.21.1 | 10 | 90375A130 | 0000 | ||
| 1/2" | 0.513" | 0.900" | 0.037" to 0.045" | ASME B18.21.1 | 10 | 90375A140 | 0000 | ||
| M3 | 3.2 mm | 6.0 mm | 0.3 mm to 0.5 mm | DIN 6797 | 5 | 90412A110 | 0000 | ||
| M4 | 4.3 mm | 8.0 mm | 0.4 mm to 0.6 mm | DIN 6797 | 5 | 90412A120 | 0000 | ||
| M5 | 5.3 mm | 10.0 mm | 0.5 mm to 0.7 mm | DIN 6797 | 5 | 90412A130 | 0000 | ||
| M6 | 6.4 mm | 11.0 mm | 0.6 mm to 0.8 mm | DIN 6797 | 5 | 90412A140 | 0000 | ||
| M8 | 8.4 mm | 15.0 mm | 0.7 mm to 0.9 mm | DIN 6797 | 5 | 90412A150 | 0000 | ||
| M10 | 10.5 mm | 18.0 mm | 0.8 mm to 1.0 mm | DIN 6797 | 1 | 90412A160 | 0000 | ||
| M12 | 13.0 mm | 20.5 mm | 0.9 mm to 1.2 mm | DIN 6797 | 1 | 90412A170 | 0000 | ||
| M14 | 15.0 mm | 24.0 mm | 0.9 mm to 1.2 mm | DIN 6797 | 1 | 90412A180 | 0000 | ||
| M16 | 17.3 mm | 26.0 mm | 1.0 mm to 1.4 mm | DIN 6797 | 1 | 90412A190 | 0000 | ||
| M20 | 21.0 mm | 33.0 mm | 1.2 mm to 1.6 mm | DIN 6797 | 1 | 90412A200 | 0000 | ||
Wear-Resistant 400 Series Stainless Steel | |||||||||
| No. 2 | 0.096" | 0.195" | 0.010" to 0.016" | — | 100 | 98438A200 | 0000 | ||
| No. 3 | 0.102" | 0.235" | 0.010" to 0.016" | ASME B18.21.1 | 100 | 98438A205 | 0000 | ||
| No. 4 | 0.115" | 0.260" | 0.012" to 0.018" | ASME B18.21.1 | 100 | 98438A210 | 0000 | ||
| No. 5 | 0.129" | 0.285" | 0.014" to 0.020" | ASME B18.21.1 | 100 | 98438A215 | 0000 | ||
| No. 6 | 0.141" | 0.320" | 0.016" to 0.022" | ASME B18.21.1 | 100 | 98438A220 | 0000 | ||
| No. 8 | 0.168" | 0.381" | 0.018" to 0.023" | ASME B18.21.1 | 100 | 98438A225 | 0000 | ||
| No. 10 | 0.195" | 0.410" | 0.018" to 0.024" | ASME B18.21.1 | 100 | 98438A230 | 0000 | ||
| No. 12 | 0.221" | 0.475" | 0.020" to 0.027" | ASME B18.21.1 | 100 | 98438A235 | 0000 | ||
| 1/4" | 0.256" | 0.510" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 98438A240 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 100 | 98438A030 | 0000 | ||
| 3/8" | 0.384" | 0.694" | 0.032" to 0.040" | ASME B18.21.1 | 50 | 98438A031 | 0000 | ||
| 7/16" | 0.448" | 0.760" | 0.032" to 0.040" | ASME B18.21.1 | 50 | 98438A032 | 0000 | ||
| 1/2" | 0.513" | 0.900" | 0.037" to 0.045" | ASME B18.21.1 | 25 | 98438A033 | 0000 | ||
| 9/16" | 0.576" | 0.985" | 0.037" to 0.045" | ASME B18.21.1 | 25 | 93419A111 | 0000 | ||
| 5/8" | 0.641" | 1.070" | 0.042" to 0.050" | ASME B18.21.1 | 25 | 98438A035 | 00000 | ||
| 3/4" | 0.768" | 1.260" | 0.047" to 0.055" | ASME B18.21.1 | 25 | 98438A036 | 00000 | ||
| 7/8" | 0.897" | 1.410" | 0.052" to 0.060" | ASME B18.21.1 | 5 | 93419A112 | 0000 | ||
| 1" | 1.025" | 1.620" | 0.059" to 0.067" | ASME B18.21.1 | 5 | 93419A113 | 00000 | ||
Internal Tooth
 |
For Screw Size | ID | OD | Thk. | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| No. 4 | 0.115" | 0.270" | 0.012" to 0.018" | ASME B18.21.1 | 100 | 91757A101 | 00000 | ||
| No. 6 | 0.141" | 0.295" | 0.016" to 0.022" | ASME B18.21.1 | 100 | 91757A103 | 0000 | ||
| No. 8 | 0.168" | 0.340" | 0.018" to 0.023" | ASME B18.21.1 | 100 | 91757A105 | 0000 | ||
| No. 10 | 0.195" | 0.381" | 0.018" to 0.024" | ASME B18.21.1 | 100 | 91757A107 | 0000 | ||
| No. 12 | 0.231" | 0.410" | 0.020" to 0.027" | ASME B18.21.1 | 100 | 91757A132 | 0000 | ||
| 1/4" | 0.256" | 0.478" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 91757A109 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 50 | 91757A111 | 0000 | ||
| 3/8" | 0.384" | 0.692" | 0.032" to 0.040" | ASME B18.21.1 | 25 | 91757A113 | 0000 | ||
| 1/2" | 0.512" | 0.900" | 0.037" to 0.045" | ASME B18.21.1 | 10 | 91757A117 | 0000 | ||
| 9/16" | 0.576" | 0.985" | 0.037" to 0.045" | ASME B18.21.1 | 10 | 91757A122 | 0000 | ||
| 5/8" | 0.640" | 1.071" | 0.042" to 0.050" | ASME B18.21.1 | 10 | 91757A128 | 0000 | ||
| 3/4" | 0.769" | 1.245" | 0.047" to 0.055" | ASME B18.21.1 | 5 | 91757A131 | 0000 | ||
| M2 | 2.2 mm | 4.5 mm | 0.2 mm to 0.4 mm | DIN 6797 | 100 | 93925A210 | 0000 | ||
| M2.3 | 2.5 mm | 5.0 mm | 0.2 mm to 0.4 mm | DIN 6797 | 100 | 93925A411 | 0000 | ||
| M2.5 | 2.7 mm | 5.5 mm | 0.2 mm to 0.5 mm | DIN 6797 | 100 | 93925A220 | 0000 | ||
| M3 | 3.2 mm | 6.0 mm | 0.3 mm to 0.5 mm | DIN 6797 | 100 | 93925A240 | 0000 | ||
| M3.5 | 3.7 mm | 7.0 mm | 0.4 mm to 0.6 mm | DIN 6797 | 100 | 93925A221 | 0000 | ||
| M4 | 4.3 mm | 8.0 mm | 0.4 mm to 0.6 mm | DIN 6797 | 100 | 93925A250 | 0000 | ||
| M5 | 5.3 mm | 10.0 mm | 0.5 mm to 0.7 mm | DIN 6797 | 100 | 93925A260 | 0000 | ||
| M6 | 6.4 mm | 11.0 mm | 0.6 mm to 0.8 mm | DIN 6797 | 100 | 93925A270 | 0000 | ||
| M7 | 7.4 mm | 12.5 mm | 0.7 mm to 0.9 mm | DIN 6797 | 50 | 93925A412 | 00000 | ||
| M8 | 8.4 mm | 15.0 mm | 0.7 mm to 0.9 mm | DIN 6797 | 100 | 93925A280 | 0000 | ||
| M10 | 10.5 mm | 18.0 mm | 0.8 mm to 1.0 mm | DIN 6797 | 50 | 93925A290 | 0000 | ||
| M12 | 13.0 mm | 20.5 mm | 0.9 mm to 1.2 mm | DIN 6797 | 50 | 93925A300 | 0000 | ||
| M14 | 15.0 mm | 24.0 mm | 0.9 mm to 1.2 mm | DIN 6797 | 25 | 93925A310 | 0000 | ||
| M16 | 17.0 mm | 26.0 mm | 1.0 mm to 1.4 mm | DIN 6797 | 25 | 93925A320 | 0000 | ||
| M18 | 19.0 mm | 30.0 mm | 1.2 mm to 1.5 mm | DIN 6797 | 10 | 93925A330 | 0000 | ||
| M20 | 21.0 mm | 33.0 mm | 1.2 mm to 1.5 mm | DIN 6797 | 10 | 93925A340 | 0000 | ||
| M22 | 23.0 mm | 36.0 mm | 1.3 mm to 1.6 mm | DIN 6797 | 10 | 93925A413 | 00000 | ||
| M24 | 25.0 mm | 38.0 mm | 1.3 mm to 1.6 mm | DIN 6797 | 10 | 93925A414 | 00000 | ||
Highly Corrosion-Resistant 316 Stainless Steel | |||||||||
| No. 4 | 0.115" | 0.270" | 0.012" to 0.018" | ASME B18.21.1 | 5 | 91108A110 | 0000 | ||
| No. 6 | 0.141" | 0.295" | 0.016" to 0.022" | ASME B18.21.1 | 5 | 91108A140 | 0000 | ||
| No. 8 | 0.168" | 0.340" | 0.018" to 0.023" | ASME B18.21.1 | 5 | 91108A220 | 0000 | ||
| No. 10 | 0.195" | 0.381" | 0.018" to 0.024" | ASME B18.21.1 | 5 | 91108A250 | 0000 | ||
| 1/4" | 0.256" | 0.478" | 0.023" to 0.028" | ASME B18.21.1 | 5 | 91108A330 | 0000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 5 | 91108A360 | 0000 | ||
| 3/8" | 0.384" | 0.692" | 0.032" to 0.040" | ASME B18.21.1 | 5 | 91108A440 | 0000 | ||
| 1/2" | 0.530" | 0.867" | 0.037" to 0.045" | ASME B18.21.1 | 5 | 91108A111 | 0000 | ||
Wear-Resistant 400 Series Stainless Steel | |||||||||
| No. 2 | 0.089" | 0.200" | 0.010" to 0.016" | ASME B18.21.1 | 100 | 98449A500 | 0000 | ||
| No. 2 | 0.095" | 0.200" | 0.010" to 0.016" | ASME B18.21.1 | 1,000 | 98449A003 | 00000 | ||
| No. 3 | 0.102" | 0.232" | 0.010" to 0.016" | ASME B18.21.1 | 100 | 98449A505 | 0000 | ||
| No. 4 | 0.115" | 0.270" | 0.012" to 0.018" | ASME B18.21.1 | 100 | 98449A510 | 0000 | ||
| No. 4 | 0.123" | 0.270" | 0.012" to 0.018" | ASME B18.21.1 | 1,000 | 98449A005 | 00000 | ||
| No. 5 | 0.136" | 0.280" | 0.014" to 0.020" | ASME B18.21.1 | 100 | 98449A515 | 0000 | ||
| No. 5 | 0.136" | 0.280" | 0.014" to 0.020" | ASME B18.21.1 | 1,000 | 98449A006 | 00000 | ||
| No. 6 | 0.141" | 0.295" | 0.016" to 0.022" | ASME B18.21.1 | 100 | 98449A520 | 0000 | ||
| No. 6 | 0.150" | 0.295" | 0.016" to 0.022" | ASME B18.21.1 | 1,000 | 98449A007 | 00000 | ||
| No. 8 | 0.168" | 0.340" | 0.018" to 0.023" | ASME B18.21.1 | 100 | 98449A525 | 0000 | ||
| No. 9 | 0.176" | 0.340" | 0.018" to 0.023" | ASME B18.21.1 | 1,000 | 98449A009 | 00000 | ||
| No. 10 | 0.195" | 0.381" | 0.018" to 0.024" | ASME B18.21.1 | 100 | 98449A530 | 0000 | ||
| No. 10 | 0.204" | 0.381" | 0.018" to 0.024" | ASME B18.21.1 | 1,000 | 98449A011 | 00000 | ||
| No. 12 | 0.221" | 0.410" | 0.020" to 0.027" | ASME B18.21.1 | 100 | 98449A535 | 0000 | ||
| 1/4" | 0.256" | 0.478" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 98449A540 | 0000 | ||
| 1/4" | 0.267" | 0.478" | 0.023" to 0.028" | ASME B18.21.1 | 1,000 | 98449A029 | 00000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 100 | 98449A030 | 0000 | ||
| 3/8" | 0.384" | 0.692" | 0.032" to 0.040" | ASME B18.21.1 | 100 | 98449A031 | 00000 | ||
| 7/16" | 0.448" | 0.789" | 0.032" to 0.040" | ASME B18.21.1 | 100 | 98449A032 | 00000 | ||
| 1/2" | 0.512" | 0.900" | 0.037" to 0.045" | ASME B18.21.1 | 50 | 98449A033 | 00000 | ||
| 9/16" | 0.576" | 0.985" | 0.037" to 0.045" | ASME B18.21.1 | 50 | 98449A034 | 00000 | ||
| 5/8" | 0.640" | 1.071" | 0.042" to 0.050" | ASME B18.21.1 | 25 | 98449A035 | 00000 | ||
| 3/4" | 0.769" | 1.245" | 0.047" to 0.055" | ASME B18.21.1 | 25 | 98449A036 | 00000 | ||
| 7/8" | 0.927" | 1.410" | 0.052" to 0.060" | ASME B18.21.1 | 5 | 98449A113 | 0000 | ||
| 1" | 1.060" | 1.640" | 0.059" to 0.067" | ASME B18.21.1 | 5 | 98449A114 | 00000 | ||
Internal and External Tooth
 |
For Screw Size | ID | OD | Thk. | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
Wear-Resistant 410 Stainless Steel | |||||||||
| No. 4 | 0.115" | 0.475" | 0.016" to 0.021" | ASME B18.21.1 | 100 | 90588A111 | 00000 | ||
| No. 6 | 0.141" | 0.510" | 0.023" to 0.028" | ASME B18.21.1 | 100 | 90588A112 | 0000 | ||
| No. 8 | 0.168" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 100 | 90588A113 | 0000 | ||
| No. 10 | 0.195" | 0.610" | 0.028" to 0.034" | ASME B18.21.1 | 100 | 90588A114 | 0000 | ||
| 1/4" | 0.256" | 0.760" | 0.032" to 0.040" | ASME B18.21.1 | 50 | 90588A115 | 0000 | ||
| 5/16" | 0.320" | 0.900" | 0.032" to 0.040" | ASME B18.21.1 | 50 | 90588A116 | 0000 | ||
| 3/8" | 0.384" | 0.985" | 0.037" to 0.045" | ASME B18.21.1 | 25 | 90588A117 | 0000 | ||
| 1/2" | 0.512" | 1.260" | 0.047" to 0.055" | ASME B18.21.1 | 10 | 90588A118 | 0000 | ||
Mil. Spec. Tooth Lock Washers
External Tooth
 |
Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding head screws.
Wear-Resistant 410 Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.
For Screw Size | ID | OD | Thk. | Mil. Spec. | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Wear-Resistant 410 Stainless Steel | ||||||||||
| No. 4 | 0.115" | 0.260" | 0.015" to 0.019" | MS35335-57 | ASME B18.21.1 | 25 | 97775A110 | 000000 | ||
| No. 6 | 0.141" | 0.320" | 0.016" to 0.022" | MS35335-58 | ASME B18.21.1 | 25 | 97775A150 | 00000 | ||
| No. 8 | 0.168" | 0.381" | 0.018" to 0.023" | MS35335-59 | ASME B18.21.1 | 25 | 97775A220 | 00000 | ||
| No. 10 | 0.195" | 0.410" | 0.020" to 0.025" | MS35335-60 | ASME B18.21.1 | 25 | 97775A260 | 00000 | ||
| 1/4" | 0.256" | 0.510" | 0.023" to 0.028" | MS35335-61 | ASME B18.21.1 | 25 | 97775A330 | 00000 | ||
| 5/16" | 0.320" | 0.610" | 0.028" to 0.034" | MS35335-62 | ASME B18.21.1 | 25 | 97775A370 | 00000 | ||
| 3/8" | 0.384" | 0.694" | 0.032" to 0.040" | MS35335-63 | ASME B18.21.1 | 25 | 97775A440 | 00000 | ||
| 7/16" | 0.448" | 0.760" | 0.032" to 0.040" | MS35335-64 | ASME B18.21.1 | 25 | 97775A511 | 00000 | ||
| 1/2" | 0.513" | 0.900" | 0.037" to 0.045" | MS35335-65 | ASME B18.21.1 | 10 | 97775A512 | 0000 | ||
| 9/16" | 0.576" | 0.985" | 0.037" to 0.045" | MS35335-66 | ASME B18.21.1 | 10 | 97775A513 | 0000 | ||
| 5/8" | 0.641" | 1.070" | 0.042" to 0.050" | MS35335-67 | ASME B18.21.1 | 5 | 97775A514 | 0000 | ||
| 3/4" | 0.768" | 1.260" | 0.047" to 0.055" | MS35335-68 | ASME B18.21.1 | 5 | 97775A515 | 0000 | ||
| 7/8" | 0.897" | 1.410" | 0.052" to 0.060" | MS35335-69 | ASME B18.21.1 | 1 | 97775A516 | 0000 | ||
| 1" | 1.025" | 1.620" | 0.059" to 0.067" | MS35335-70 | ASME B18.21.1 | 1 | 97775A517 | 0000 | ||
Internal Tooth
 |
Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.
Wear-Resistant 410 Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.
For Screw Size | ID | OD | Thk. | Mil. Spec. | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Wear-Resistant 410 Stainless Steel | ||||||||||
| No. 2 | 0.089" | 0.200" | 0.010" to 0.015" | MS35333-69, NASM35333 | ASME B18.21.1 | 25 | 96551A110 | 00000 | ||
| No. 4 | 0.115" | 0.270" | 0.015" to 0.019" | MS35333-70, NASM35333 | ASME B18.21.1 | 25 | 96551A550 | 00000 | ||
| No. 6 | 0.141" | 0.295" | 0.017" to 0.021" | MS35333-71, NASM35333 | ASME B18.21.1 | 25 | 96551A610 | 00000 | ||
| No. 8 | 0.168" | 0.340" | 0.018" to 0.023" | MS35333-72, NASM35333 | ASME B18.21.1 | 25 | 96551A670 | 00000 | ||
| No. 10 | 0.195" | 0.381" | 0.020" to 0.025" | MS35333-73, NASM35333 | ASME B18.21.1 | 25 | 96551A770 | 00000 | ||
| 1/4" | 0.256" | 0.478" | 0.023" to 0.028" | MS35333-74, NASM35333 | ASME B18.21.1 | 25 | 96551A790 | 00000 | ||
| 5/16" | 0.332" | 0.610" | 0.028" to 0.034" | MS35333-75, NASM35333 | ASME B18.21.1 | 25 | 96551A120 | 0000 | ||
| 3/8" | 0.384" | 0.692" | 0.032" to 0.040" | MS35333-76, NASM35333 | ASME B18.21.1 | 25 | 96551A130 | 00000 | ||
| 7/16" | 0.448" | 0.789" | 0.032" to 0.040" | MS35333-77, NASM35333 | ASME B18.21.1 | 25 | 96551A140 | 00000 | ||
| 1/2" | 0.512" | 0.900" | 0.037" to 0.045" | MS35333-78, NASM35333 | ASME B18.21.1 | 10 | 96551A150 | 00000 | ||
| 5/8" | 0.640" | 1.071" | 0.042" to 0.050" | MS35333-80, NASM35333 | ASME B18.21.1 | 10 | 96551A160 | 00000 | ||
| 3/4" | 0.769" | 1.245" | 0.047" to 0.055" | MS35333-81, NASM35333 | ASME B18.21.1 | 5 | 96551A170 | 00000 | ||
| 7/8" | 0.894" | 1.410" | 0.052" to 0.060" | MS35333-82, NASM35333 | ASME B18.21.1 | 5 | 96551A180 | 00000 | ||
Countersunk Tooth Lock Washers
External Tooth
 |
Teeth on the outside edge bite into both the screw head and the mating surface to lock the assembly in place.
Wear-Resistant 400 Series Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.
For Screw Size | ID | OD | Thk. | Countersink Angle | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Wear-Resistant 400 Series Stainless Steel | ||||||||||
| No. 6 | 0.140" | 0.289" | 0.017" to 0.021" | 82° | ASME B18.21.1 | 100 | 90900A007 | 00000 | ||
| No. 8 | 0.167" | 0.322" | 0.017" to 0.021" | 82° | ASME B18.21.1 | 100 | 90900A009 | 0000 | ||
| No. 10 | 0.195" | 0.354" | 0.020" to 0.025" | 82° | ASME B18.21.1 | 25 | 90900A012 | 0000 | ||
| No. 12 | 0.220" | 0.421" | 0.020" to 0.025" | 82° | ASME B18.21.1 | 50 | 90900A111 | 0000 | ||
| 1/4" | 0.255" | 0.454" | 0.020" to 0.025" | 82° | ASME B18.21.1 | 25 | 90900A030 | 0000 | ||
| 5/16" | 0.318" | 0.599" | 0.023" to 0.028" | 82° | ASME B18.21.1 | 25 | 90900A112 | 0000 | ||
Locknuts with External-Tooth Lock Washer
 |
Corrosion-Resistant Stainless Steel
Thread Size | Wd. | Ht. | Washer OD | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||||
| 4-40 | 1/4" | 1/8" | 0.281" | 100 | 96278A005 | 000000 | ||
| 4-48 | 1/4" | 1/8" | 0.281" | 100 | 96278A101 | 00000 | ||
| 6-32 | 5/16" | 9/64" | 0.344" | 100 | 96278A007 | 00000 | ||
| 8-32 | 11/32" | 11/64" | 0.375" | 100 | 96278A009 | 00000 | ||
| 10-24 | 3/8" | 11/64" | 0.406" | 100 | 96278A011 | 00000 | ||
| 10-32 | 3/8" | 11/64" | 0.406" | 100 | 96278A411 | 00000 | ||
| 12-24 | 7/16" | 11/64" | 0.506" | 50 | 96278A111 | 00000 | ||
| 1/4"-20 | 7/16" | 15/64" | 0.5" | 50 | 96278A511 | 00000 | ||
| 1/4"-28 | 7/16" | 15/64" | 0.5" | 50 | 96278A515 | 00000 | ||
| 5/16"-18 | 1/2" | 21/64" | 0.578" | 25 | 96278A519 | 00000 | ||
| 5/16"-24 | 1/2" | 21/64" | 0.578" | 25 | 96278A523 | 00000 | ||
| 3/8"-16 | 9/16" | 25/64" | 0.656" | 25 | 96278A527 | 00000 | ||
| 3/8"-24 | 9/16" | 25/64" | 0.656" | 10 | 96278A531 | 0000 | ||
| 1/2"-13 | 3/4" | 7/16" | 0.898" | 10 | 96278A112 | 0000 | ||
| M3 × 0.5 mm | 5.5 mm | 3.3 mm | 6.5 mm | 50 | 90923A216 | 00000 | ||
| M4 × 0.7 mm | 7 mm | 4.1 mm | 8.2 mm | 50 | 90923A219 | 00000 | ||
| M5 × 0.8 mm | 8 mm | 5.2 mm | 9.5 mm | 25 | 90923A222 | 0000 | ||
| M6 × 1 mm | 10 mm | 6.2 mm | 11.5 mm | 25 | 90923A227 | 0000 | ||
| M8 × 1.25 mm | 13 mm | 8.5 mm | 15.1 mm | 5 | 90923A241 | 0000 | ||
| M10 × 1.5 mm | 17 mm | 9.7 mm | 19.2 mm | 5 | 90923A282 | 00000 | ||
Black-Oxide 18-8 Stainless Steel | ||||||||
| M3 × 0.5 mm | 5.5 mm | 3.3 mm | 6.5 mm | 25 | 90923A231 | 0000 | ||
| M4 × 0.7 mm | 7 mm | 4.1 mm | 8.2 mm | 25 | 90923A232 | 00000 | ||
| M5 × 0.8 mm | 8 mm | 5.2 mm | 9.5 mm | 25 | 90923A233 | 00000 | ||
| M6 × 1 mm | 10 mm | 6.2 mm | 11.5 mm | 25 | 90923A234 | 00000 | ||
Narrow-Profile Locknuts with External-Tooth Lock Washer
 |
Corrosion-Resistant Stainless Steel
Thread Size | Wd. | Ht. | Washer OD | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||||
| 6-32 | 1/4" | 1/8" | 0.287" | 100 | 96278A113 | 000000 | ||
Assortments of Locknuts with External-Tooth Lock Washer
 |
|
No. of Pieces | Locknuts Included | Container Type | Each | |||
|---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||
| 600 | 4-40 (100 Pieces) 6-32 (100 Pieces) 8-32 (100 Pieces) 10-24 (100 Pieces) 10-32 (100 Pieces) 1/4"-20 (100 Pieces) | Plastic Box | 90625A500 | 000000 | ||
