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.
- Provide maximum torsional resistance.
- Work best with larger head screws (round, pan, binding, etc.)
| Nominal Washer Size |
Hole Diameter Min. |
Hole Diameter Max. |
Outside Diameter Min. |
Outside Diameter Max. |
Thickness | WCL Part Number |
Cross Reference |
Steel Plated MS35335 |
Stainless Steel MS35335 |
Bronze Alloy MS35335 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 0.089 | 0.095 | 0.275 | 0.285 | 0.017 | EXT-0086-01-00 | 1102-01 | |||
| 3 | 0.102 | 0.109 | 0.22 | 0.235 | 0.013 | EXT-0099-00-00 | 1103-00 | |||
| 4 | 0.115 | 0.123 | 0.245 | 0.26 | 0.015 | EXT-0112-00-00 | 1104-00 | -29 | -57 | -85 |
| 4 | 0.116 | 0.123 | 0.275 | 0.285 | 0.015 | EXT-0112-01-00 | 1104-01 | |||
| 4 | 0.116 | 0.123 | 0.215 | 0.225 | 0.015 | EXT-0112-02-00 | 1104-02 | |||
| 5 | 0.129 | 0.136 | 0.27 | 0.285 | 0.015 | EXT-0125-00-00 | 1105-00 | |||
| 6 | 0.141 | 0.15 | 0.305 | 0.32 | 0.02 | EXT-0138-00-00 | 1106-00 | -30 | -58 | -86 |
| 6 | 0.142 | 0.15 | 0.37 | 0.381 | 0.022 | EXT-0138-01-00 | 1106-01 | |||
| 6 | 0.15 | 0.142 | 0.306 | 0.317 | 0.017 | EXT-0138-05-00 | 1106-05 | |||
| 8 | 0.168 | 0.176 | 0.365 | 0.381 | 0.02 | EXT-0164-00-00 | 1108-00 | -31 | -59 | -87 |
| 8 | 0.168 | 0.176 | 0.37 | 0.381 | 0.025 | EXT-0164-01-00 | 1108-01 | |||
| 8 | 0.168 | 0.176 | 0.68 | 0.695 | 0.039 | EXT-0164-02-00 | 1108-02 | |||
| 8 | 0.168 | 0.176 | 0.494 | 0.506 | 0.02 | EXT-0164-05-00 | 1108-05 | |||
| 8 | 0.168 | 0.176 | 0.494 | 0.506 | 0.022 | EXT-0164-08-00 | 1108-08 | |||
| 8 | 0.165 | 0.17 | 0.306 | 0.317 | 0.02 | EXT-0164-11-00 | 1108-11 | |||
| 10 | 0.195 | 0.204 | 0.395 | 0.41 | 0.022 | EXT-0190-00-00 | 1110-00 | -32 | -60 | -88 |
| 10 | 0.195 | 0.199 | 0.335 | 0.345 | 0.017 | EXT-0190-03-00 | 1110-03 | |||
| 10 | 0.195 | 0.204 | 0.395 | 0.406 | 0.029 | EXT-0190-04-00 | 1110-04 | |||
| 10 | 0.195 | 0.204 | 0.494 | 0.506 | 0.025 | EXT-0190-07-00 | 1110-07 | |||
| 12 | 0.221 | 0.231 | 0.46 | 0.475 | 0.025 | EXT-0216-00-00 | 1112-00 | |||
| 12 | 0.218 | 0.224 | 0.395 | 0.406 | 0.022 | EXT-0216-05-00 | 1112-05 | |||
| 1/4 | 0.256 | 0.267 | 0.494 | 0.51 | 0.025 | EXT-0250-00-00 | 1114-00 | -33 | -61 | -89 |
| 1/4 | 0.257 | 0.263 | 0.428 | 0.44 | 0.017 | EXT-0250-02-00 | 1114-02 | |||
| 1/4 | 0.256 | 0.267 | 0.882 | 0.898 | 0.045 | EXT-0250-04-00 | 1114-04 | |||
| 1/4 | 0.256 | 0.267 | 0.365 | 0.375 | 0.02 | EXT-0250-05-00 | 1114-05 | |||
| 1/4 | 0.256 | 0.267 | 0.68 | 0.695 | 0.039 | EXT-0250-09-00 | 1114-09 | |||
| 1/4 | 0.246 | 0.25 | 0.365 | 0.375 | 0.017 | EXT-0250-11-00 | 1114-11 | |||
| 1/4 | 0.256 | 0.267 | 0.882 | 0.898 | 0.039 | EXT-0250-16-00 | 1114-16 | |||
| 1/4 | 0.256 | 0.267 | 0.365 | 0.375 | 0.029 | EXT-0250-18-00 | 1114-18 | |||
| 5/16 | 0.32 | 0.332 | 0.588 | 0.61 | 0.029 | EXT-0312-00-00 | 1118-00 | -34 | -62 | -90 |
| 5/16 | 0.32 | 0.332 | 0.68 | 0.695 | 0.035 | EXT-0312-02-00 | 1118-02 | |||
| 5/16 | 0.353 | 0.357 | 0.64 | 0.654 | 0.035 | EXT-0312-11-00 | 1118-11 | |||
| 3/8 | 0.384 | 0.398 | 0.67 | 0.694 | 0.035 | EXT-0375-00-00 | 1120-00 | -35 | -63 | -91 |
| 1/8 Pipe | 0.406 | 0.42 | 0.68 | 0.695 | 0.035 | EXT-0375-01-00 | 1120-01 | |||
| 3/8 | 0.384 | 0.398 | 0.883 | 0.898 | 0.039 | EXT-0375-06-00 | 1120-06 | |||
| 3/8 | 0.384 | 0.398 | 0.615 | 0.635 | 0.035 | EXT-0375-08-00 | 1120-08 | |||
| 3/8 | 0.384 | 0.398 | 1.24 | 1.26 | 0.035 | EXT-0375-09-00 | 1120-09 | |||
| 3/8 | 0.38 | 0.387 | 0.55 | 0.562 | 0.015 | EXT-0375-12-00 | 1120-12 | |||
| 7/16 | 0.448 | 0.464 | 0.74 | 0.76 | 0.035 | EXT-0437-00-00 | 1122-00 | -36 | -64 | -92 |
| 7/16 | 0.468 | 0.488 | 0.74 | 0.76 | 0.035 | EXT-0437-09-00 | 1122-09 | |||
| 1/2 | 0.513 | 0.53 | 0.882 | 0.9 | 0.039 | EXT-0500-00-00 | 1124-00 | -37 | -65 | -93 |
| 1/2 | 0.512 | 0.529 | 1.38 | 1.41 | 0.055 | EXT-0500-01-00 | 1124-01 | |||
| 1/2 | 0.512 | 0.529 | 0.882 | 0.898 | 0.05 | EXT-0500-06-00 | 1124-06 | |||
| 9/16 | 0.576 | 0.596 | 0.96 | 0.985 | 0.039 | EXT-0562-00-00 | 1126-00 | -38 | -66 | -94 |
| 5/8 | 0.641 | 0.663 | 1.045 | 1.07 | 0.045 | EXT-0625-00-00 | 1128-00 | -39 | -67 | -95 |
| 5/8 | 0.625 | 0.635 | 0.839 | 0.849 | 0.035 | EXT-0625-06-00 | 1128-06 | |||
| 11/16 | 0.69 | 0.696 | 0.914 | 0.922 | 0.035 | EXT-0687-05-00 | 1130-05 | |||
| 3/4 | 0.768 | 0.79 | 1.22 | 1.26 | 0.05 | EXT-0750-00-00 | 1132-00 | -40 | -68 | -96 |
| 7/8 | 0.897 | 0.927 | 1.38 | 1.41 | 0.055 | EXT-0875-00-00 | 1134-00** | -41 | -69 | -97 |
| 1 | 1.025 | 1.06 | 1.59 | 1.62 | 0.062 | EXT-1000-00-00 | 1136-00 | -42 | -70 | -98 |
| 1-1/8 | 1.128 | 1.142 | 1.797 | 1.827 | 0.062 | EXT-1125-03-00 | 1138-03 | |||
| 1-1/4 | 1.269 | 1.293 | 2.172 | 2.202 | 0.062 | EXT-1250-01-00 | 1140-01 | |||
| 1.5625 | 1.56 | 1.58 | 2.359 | 2.392 | 0.094 | EXT-1562-01-00 | 1145-01 | |||
| 2-3/4 | 2.8 | 2.825 | 3.49 | 3.51 | 0.078 | EXT-2750-01-00 | 1164-01 | |||
| 2-3/4 | 2.8 | 2.825 | 3.49 | 3.51 | 0.078 | EXT-2750-02-00 | 1164-02* |
* Left Hand Twist
**Type B option also stocked
**Type B option also stocked
Type “B” Tooth Form
The Type “B” is listed as an alternative tooth form in ASME B18.21.1 Military Standards, S.A.E., etc. It is available for many of the styles and sizes of tooth washers shown in this catalog, including external, internal, external-internal and many others. To order, specify the WCL part number and designate “Type B” for example: 1114-00 Type B.