Materials: Part numbers shown are for washers made of spring steel. These washers are also available in bronze and bronze alloy and in 400 series stainless steel. Many of these are in stock at WCL. Washers can also be produced from 300 series stainless steel and other materials on request. Specify material when inquiring or ordering.
Specifications: All commercial and military tooth lockwashers supplied by WCL Company and listed on these pages conform to ASME B18.21.1 and to all applicable specifications as reported by IFI.
- Work best with smaller screw heads (such as fillister heads).
- Use where appearance warrants that teeth be hidden.
- Use where snagging or scratching could be a problem.
- Internal teeth lock into bolt head or nut to prevent backoff rotation.
| Nominal Washer Size |
Hole Diameter Min. |
Hole Diameter Max. |
Outside Diameter Min. |
Outside Diameter Max. |
Thickness | WCL Part Number |
Cross Reference |
Steel Plated MS35333 |
Stainless Steel MS35333 |
Bronze Alloy MS35333 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 0.089 | 0.095 | 0.175 | 0.2 | 0.013 | INT-0086-00-00 | 1202-00 | -35 | -69 | -103 |
| 2 | 0.089 | 0.096 | 0.175 | 0.185 | 0.007 | INT-0086-01-00 | 1202-01 | |||
| 2 | 0.094 | 0.098 | 0.175 | 0.185 | 0.013 | INT-0086-04-00 | 1202-04 | |||
| 3 | 0.102 | 0.109 | 0.215 | 0.232 | 0.015 | INT-0099-00-00 | 1203-00 | |||
| 3 | 0.106 | 0.109 | 0.215 | 0.225 | 0.013 | INT-0099-00-00 | 1203-01 | |||
| 4 | 0.115 | 0.123 | 0.255 | 0.27 | 0.015 | INT-0112-00-00 | 1204-00 | -36 | -70 | -104 |
| 4 | 0.116 | 0.123 | 0.215 | 0.225 | 0.015 | INT-0112-03-00 | 1204-03 | |||
| 5 | 0.129 | 0.136 | 0.245 | 0.28 | 0.017 | INT-0125-00-00 | 1205-00 | |||
| 5 | 0.124 | 0.128 | 0.215 | 0.225 | 0.017 | INT-0125-08-00 | 1205-08 | |||
| 6 | 0.141 | 0.15 | 0.275 | 0.295 | 0.017 | INT-0138-00-00 | 1206-00 | -37 | -71 | -105 |
| 6 | 0.142 | 0.15 | 0.245 | 0.255 | 0.017 | INT-0138-01-00 | 1206-01 | |||
| 6 | 0.146 | 0.151 | 0.275 | 0.285 | 0.018 | INT-0138-05-00 | 1206-05 | |||
| 6 | 0.142 | 0.15 | 0.307 | 0.317 | 0.025 | INT-0138-06-00 | 1206-06 | |||
| 6 | 0.142 | 0.15 | 0.278 | 0.288 | 0.013 | INT-0138-07-00 | 1206-07 | |||
| 8 | 0.168 | 0.176 | 0.325 | 0.34 | 0.02 | INT-0164-00-00 | 1208-00 | -38 | -72 | -106 |
| 8 | 0.168 | 0.176 | 0.325 | 0.336 | 0.025 | INT-0164-01-00 | 1208-01 | |||
| 8 | 0.168 | 0.176 | 0.3 | 0.311 | 0.02 | INT-0164-05-00 | 1208-05 | |||
| 8 | 0.168 | 0.176 | 0.325 | 0.336 | 0.01 | INT-0164-06-00 | 1208-06 | |||
| 8 | 0.168 | 0.176 | 0.494 | 0.506 | 0.017 | INT-0164-08-00 | 1208-08 | |||
| 8 | 0.166 | 0.17 | 0.275 | 0.285 | 0.02 | INT-0164-11-00 | 1208-11 | |||
| 8 | 0.165 | 0.169 | 0.278 | 0.288 | 0.018 | INT-0164-12-00 | 1208-12 | |||
| 10 | 0.195 | 0.204 | 0.365 | 0.381 | 0.022 | INT-0190-00-00 | 1210-00 | -39 | -73 | -107 |
| 10 | 0.195 | 0.204 | 0.495 | 0.505 | 0.025 | INT-0190-01-00 | 1210-01 | |||
| 10 | 0.188 | 0.194 | 0.593 | 0.607 | 0.029 | INT-0190-03-02 | 1210-03 | |||
| 10 | 0.195 | 0.204 | 0.3 | 0.311 | 0.017 | INT-0190-06-00 | 1210-06 | |||
| 10 | 0.195 | 0.204 | 0.37 | 0.381 | 0.01 | INT-0190-07-00 | 1210-07 | |||
| 10 | 0.195 | 0.204 | 0.743 | 0.758 | 0.02 | INT-0190-10-00 | 1210-10 | |||
| 10 | 0.204 | 0.21 | 0.3 | 0.311 | 0.017 | INT-0190-15-00 | 1210-15 | |||
| 12 | 0.221 | 0.231 | 0.394 | 0.41 | 0.022 | INT-0216-00-00 | 1212-00 | |||
| 12 | 0.218 | 0.222 | 0.372 | 0.383 | 0.017 | INT-0216-03-00 | 1212-03 | |||
| 12 | 0.218 | 0.222 | 0.372 | 0.383 | 0.022 | INT-0216-08-00 | 1212-04 | |||
| 1/4 | 0.256 | 0.267 | 0.466 | 0.478 | 0.025 | INT-0250-00-00 | 1214-00 | -40 | -74 | -108 |
| 1/4 | 0.256 | 0.267 | 0.555 | 0.565 | 0.025 | INT-0250-01-00 | 1214-01 | |||
| 1/4 | 0.256 | 0.267 | 0.396 | 0.408 | 0.017 | INT-0250-05-00 | 1214-05 | -125 | -135 | -145 |
| 1/4 | 0.256 | 0.267 | 0.466 | 0.478 | 0.025 | INT-0250-06-00 | 1214-06* | |||
| 1/4 | 0.256 | 0.267 | 0.806 | 0.818 | 0.025 | INT-0250-07-00 | 1214-07 | |||
| 1/4 | 0.256 | 0.267 | 0.618 | 0.632 | 0.025 | INT-0250-09-00 | 1214-09 | |||
| 1/4 | 0.256 | 0.267 | 0.396 | 0.408 | 0.025 | INT-0250-10-00 | 1214-10 | |||
| 1/4 | 0.256 | 0.267 | 0.396 | 0.408 | 0.013 | INT-0250-11-00 | 1214-11 | |||
| 1/4 | 0.256 | 0.267 | 0.618 | 0.632 | 0.029 | INT-0250-12-00 | 1214-12 | |||
| 1/4 | 0.256 | 0.267 | 0.595 | 0.615 | 0.022 | INT-0250-14-00 | 1214-14 | |||
| 1/4 | 0.252 | 0.256 | 0.396 | 0.408 | 0.017 | INT-0250-15-00 | 1214-15 | |||
| 16 | 0.285 | 0.296 | 0.494 | 0.506 | 0.029 | INT-0281-01-00 | 1216-01 | |||
| 5/16 | 0.32 | 0.332 | 0.594 | 0.61 | 0.029 | INT-0312-00-00 | 1218-00 | -41 | -75 | -109 |
| 5/16 | 0.314 | 0.322 | 0.425 | 0.435 | 0.022 | INT-0312-02-00 | 1218-02 | |||
| 5/16 | 0.314 | 0.322 | 0.425 | 0.435 | 0.015 | INT-0312-04-00 | 1218-04 | |||
| 5/16 | 0.32 | 0.332 | 0.74 | 0.76 | 0.045 | INT-0312-05-00 | 1218-05 | |||
| 3/8 | 0.384 | 0.398 | 0.67 | 0.692 | 0.035 | INT-0375-00-00 | 1220-00 | -42 | -76 | -110 |
| 3/8 | 0.384 | 0.398 | 0.678 | 0.692 | 0.022 | INT-0375-01-00 | 1220-01 | |||
| 3/8 | 0.377 | 0.391 | 0.493 | 0.507 | 0.022 | INT-0375-02-00 | 1220-02 | |||
| 3/8 | 0.405 | 0.415 | 0.678 | 0.692 | 0.022 | INT-0375-04-00 | 1220-04 | |||
| 3/8 | 0.38 | 0.387 | 0.557 | 0.567 | 0.017 | INT-0375-05-00 | 1220-05† | |||
| 3/8 | 0.384 | 0.398 | 1.147 | 1.166 | 0.035 | INT-0375-06-00 | 1220-06 | |||
| 3/8 | 0.41 | 0.425 | 0.595 | 0.615 | 0.022 | INT-0375-08-00 | 1220-08 | |||
| 3/8 | 0.38 | 0.387 | 0.557 | 0.567 | 0.025 | INT-0375-10-00 | 1220-10† | |||
| 3/8 | 0.38 | 0.387 | 0.557 | 0.567 | 0.02 | INT-0375-13-00 | 1220-13† | |||
| 3/8 | 0.395 | 0.4 | 0.733 | 0.747 | 0.039 | INT-0375-14-00 | 1220-14 | |||
| 3/8 | 0.377 | 0.391 | 0.595 | 0.615 | 0.022 | INT-0375-15-00 | 1220-15 | |||
| 7/16 | 0.448 | 0.464 | 0.74 | 0.789 | 0.035 | INT-0437-00-00 | 1222-00 | -43 | -77 | -111 |
| 7/16 | 0.472 | 0.48 | 0.593 | 0.607 | 0.017 | INT-0437-01-00 | 1222-01† | -126 | -136 | -146 |
| 7/16 | 0.439 | 0.442 | 0.533 | 0.547 | 0.022 | INT-0437-04-00 | 1222-04 | |||
| 7/16 | 0.448 | 0.463 | 0.774 | 0.789 | 0.02 | INT-0437-05-00 | 1222-05 | |||
| 7/16 | 0.472 | 0.48 | 0.593 | 0.607 | 0.022 | INT-0437-09-00 | 1222-09† | |||
| 7/16 | 0.448 | 0.463 | 0.593 | 0.607 | 0.017 | INT-0437-13-00 | 1222-13 | |||
| 1/2 | 0.512 | 0.53 | 0.867 | 0.9 | 0.039 | INT-0500-00-00 | 1224-00 | -44 | -78 | -113 |
| 1/2 | 0.505 | 0.512 | 0.62 | 0.63 | 0.02 | INT-0500-02-00 | 1224-02† | |||
| 1/2 | 0.512 | 0.529 | 0.867 | 0.883 | 0.039 | INT-0500-03-00 | 1224-03 | |||
| 1/2 | 0.545 | 0.56 | 0.765 | 0.785 | 0.025 | INT-0500-06-00 | 1224-06 | |||
| 1/2 | 0.512 | 0.529 | 0.774 | 0.789 | 0.035 | INT-0500-07-00 | 1224-07 | |||
| 1/2 | 0.512 | 0.529 | 0.774 | 0.789 | 0.01 | INT-0500-08-00 | 1224-08 | |||
| 1/2 | 0.545 | 0.56 | 0.765 | 0.785 | 0.03 | INT-0500-10-00 | 1224-10 | |||
| 1/2 | 0.505 | 0.512 | 0.62 | 0.63 | 0.013 | INT-0500-12-00 | 1224-12† | |||
| 1/2 | 0.52 | 0.53 | 0.733 | 0.747 | 0.029 | INT-0500-14-00 | 1224-14 | |||
| 9/16 | 0.576 | 0.596 | 0.957 | 0.985 | 0.039 | INT-0562-00-00 | 1226-00 | |||
| 9/16 | 0.575 | 0.585 | 0.763 | 0.777 | 0.029 | INT-0562-03-00 | 1226-03 | |||
| 9/16 | 0.565 | 0.572 | 0.678 | 0.692 | 0.017 | INT-0562-07-00 | 1226-07 | -127 | -137 | -147 |
| 9/16 | 0.575 | 0.585 | 0.763 | 0.777 | 0.015 | INT-0562-08-00 | 1226-08 | |||
| 5/8 | 0.64 | 0.663 | 1.045 | 1.071 | 0.045 | INT-0625-00-00 | 1228-00 | -46 | -80 | -115 |
| 5/8 | 0.64 | 0.659 | 1.053 | 1.071 | 0.022 | INT-0625-01-00 | 1228-01 | |||
| 5/8 | 0.64 | 0.659 | 0.867 | 0.883 | 0.022 | INT-0625-02-00 | 1228-02 | |||
| 5/8 | 0.69 | 0.7 | 0.945 | 0.968 | 0.029 | INT-0625-03-00 | 1228-03 | |||
| 5/8 | 0.64 | 0.659 | 1.053 | 1.071 | 0.045 | INT-0625-04-00 | 1228-04* | |||
| 5/8 | 0.64 | 0.659 | 0.867 | 0.883 | 0.022 | INT-0625-05-00 | 1228-05* | |||
| 5/8 | 0.625 | 0.63 | 0.774 | 0.789 | 0.02 | INT-0625-06-00 | 1228-06 | |||
| 5/8 | 0.64 | 0.659 | 0.945 | 0.965 | 0.045 | INT-0625-07-00 | 1228-07 | |||
| 11/16 | 0.704 | 0.728 | 1.13 | 1.166 | 0.045 | INT-0687-00-00 | 1230-00 | |||
| 3/4 | 0.769 | 0.795 | 1.22 | 1.245 | 0.05 | INT-0750-00-00 | 1232-00 | -47 | -81 | -116 |
| 3/4 | 0.769 | 0.795 | 1.22 | 1.245 | 0.025 | INT-0750-03-00 | 1232-03 | |||
| 3/4 | 0.757 | 0.76 | 1.047 | 1.077 | 0.022 | INT-0750-04-00 | 1232-04 | |||
| 3/4 | 0.775 | 0.785 | 1.047 | 1.077 | 0.022 | INT-0750-07-00 | 1232-07 | -129 | -139 | -149 |
| 3/4 | 0.79 | 0.8 | 1.22 | 1.245 | 0.05 | INT-0750-08-00 | 1232-08 | |||
| 3/4 | 0.757 | 0.76 | 1.047 | 1.077 | 0.022 | INT-0750-12-00 | 1232-12† | |||
| 13/16 | 0.832 | 0.856 | 1.365 | 1.386 | 0.05 | INT-0812-00-00 | 1233-00 | |||
| 13/16 | 0.832 | 0.856 | 1.047 | 1.386 | 0.05 | INT-0812-03-00 | 1233-03 | |||
| 13/16 | 0.86 | 0.87 | 1.365 | 1.386 | 0.05 | INT-0812-04-00 | 1233-04 | |||
| 7/8 | 0.894 | 0.927 | 1.364 | 1.41 | 0.055 | INT-0875-00-00 | 1234-00 | -48 | -82 | -117 |
| 7/8 | 0.894 | 0.918 | 1.364 | 1.386 | 0.025 | INT-0875-01-00 | 1234-01 | |||
| 7/8 | 0.88 | 0.89 | 1.08 | 1.11 | 0.02 | INT-0875-04-00 | 1234-04 | |||
| 7/8 | 0.894 | 0.918 | 1.364 | 1.386 | 0.02 | INT-0875-05-00 | 1234-05 | |||
| 15/16 | 0.985 | 1.015 | 1.36 | 1.39 | 0.029 | INT-0937-02-00 | 1235-02 | |||
| 1 | 1.019 | 1.06 | 1.59 | 1.637 | 0.062 | INT-1000-00-00 | 1236-00 | -49 | -83 | -118 |
| 1 | 1.01 | 1.02 | 1.36 | 1.39 | 0.025 | INT-1000-05-00 | 1236-05 | |||
| 1 1/8 | 1.144 | 1.192 | 1.799 | 1.83 | 0.062 | INT-1125-00-00 | 1238-00 | |||
| 1 1/8 | 1.163 | 1.175 | 1.425 | 1.45 | 0.015 | INT-1125-04-00 | 1238-04 | |||
| 1 1/8 | 1.163 | 1.175 | 1.425 | 1.45 | 0.025 | INT-1125-08-00 | 1238-08 | |||
| 1 3/16 | 1.206 | 1.231 | 1.799 | 1.825 | 0.03 | INT-1187-02-00 | 1239-02 | |||
| 1 1/4 | 1.26 | 1.28 | 1.921 | 1.95 | 0.062 | INT-1250-01-00 | 1240-01 | -51 | -85 | -120 |
| 1 1/4 | 1.26 | 1.28 | 1.799 | 1.825 | 0.025 | INT-1250-02-00 | 1240-02 | |||
| 1 5/16 | 1.331 | 1.356 | 1.921 | 1.95 | 0.062 | INT-1312-00-00 | 1241-00 | |||
| 1 3/8 | 1.394 | 1.418 | 1.92 | 1.95 | 0.062 | INT-1375-00-00 | 1242-00 | |||
| 1 3/8 | 1.394 | 1.418 | 1.92 | 1.95 | 0.03 | INT-1375-01-00 | 1242-01 | |||
| 1 1/2 | 1.5 | 1.53 | 2.485 | 2.515 | 0.078 | INT-1500-00-00 | 1244-00 | |||
| 1 1/2 | 1.5 | 1.53 | 2.485 | 2.515 | 0.055 | INT-1500-01-00 | 1244-01 | |||
| 1 5/8 | 1.63 | 1.645 | 1.797 | 1.827 | 0.015 | INT-1625-02-00 | 1246-02 | |||
| 1 5/8 | 1.668 | 1.644 | 2.267 | 2.233 | .062 | INT-1625-01-00 | 1246-01 | |||
| 1 3/4 | 1.75 | 1.78 | 2.625 | 2.655 | 0.078 | INT-1750-00-00 | 1248-00 | |||
| 1 3/4 | 1.768 | 1.79 | 2.219 | 2.281 | 0.029 | INT-1750-01-00 | 1248-01 | |||
| 1 3/4 | 1.75 | 1.78 | 2.61 | 2.64 | 0.055 | INT-1750-02-00 | 1248-02 | |||
| 1 7/8 | 1.875 | 1.905 | 2.495 | 2.545 | 0.078 | INT-1875-00-00 | 1250-00 | |||
| 1 15/16 | 1.938 | 1.968 | 2.61 | 2.64 | 0.078 | INT-1937-00-00 | 1251-00 | |||
| 2 | 2.01 | 2.03 | 2.865 | 2.9 | 0.062 | INT-2000-01-00 | 1252-01 | |||
| 2 | 2.015 | 2.03 | 2.47 | 2.5 | 0.025 | INT-2000-02-00 | 1252-02 | |||
| 2 1/2 | 2.49 | 2.51 | 2.985 | 3.015 | 0.078 | INT-2500-01-00 | 1260-01 |
* Left Hand Twist
† Alternate Tooth Twist
† Alternate Tooth Twist