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.
- Use where large bearing surface is desired.
- Use to span oversized or elongated holes.
- Use as insert between two adjustable pieces to maintain their position after original setting.
- Ideal for electrical bonding.
Steel parts are available plain or with a zinc .00015″ standard finish. Other materials and finishes available on request.
| Nominal Washer Size |
Hole Dia. Min. | Hole Dia. Max. | Outside Dia. Min. | Outside Dia. Max. | Thickness | WCL Part Numbers |
Cross Reference |
MS45904 Steel Plated |
|---|---|---|---|---|---|---|---|---|
| 4 | 0.115 | 0.123 | 0.46 | 0.475 | 0.017 | EIT-0112-12-01 | 4004-12-01 | -51 |
| 6 | 0.141 | 0.15 | 0.495 | 0.51 | 0.025 | EIT-0138-14-00 | 4006-14-00 | -54 |
| 8 | 0.168 | 0.176 | 0.494 | 0.506 | 0.025 | EIT-0164-14-00 | 4008-14-00 | |
| 8 | 0.168 | 0.176 | 0.58 | 0.61 | 0.029 | EIT-0164-18-00 | 4008-18-00 | -57 |
| 8 | 0.168 | 0.176 | 0.68 | 0.695 | 0.029 | EIT-0164-20-01 | 4008-20-01 | -58 |
| 8 | 0.168 | 0.176 | 0.74 | 0.76 | 0.029 | EIT-0164-22-01 | 4008-22-01 | -59 |
| 10 | 0.195 | 0.204 | 0.494 | 0.506 | 0.025 | EIT-0190-14-00 | 4010-14-00 | |
| 10 | 0.195 | 0.204 | 0.58 | 0.61 | 0.029 | EIT-0190-18-00 | 4010-18-00 | -60 |
| 10 | 0.195 | 0.204 | 0.68 | 0.695 | 0.035 | EIT-0190-20-01 | 4010-20-01 | -61 |
| 10 | 0.195 | 0.204 | 0.74 | 0.76 | 0.035 | EIT-0190-22-00 | 4010-22-00 | -62 |
| 10 | 0.195 | 0.204 | 0.882 | 0.898 | 0.035 | EIT-0190-24-00 | 4010-24-00 | -63 |
| 12 | 0.221 | 0.231 | 0.67 | 0.69 | 0.035 | EIT-0216-20-00 | 4012-20-00 | |
| 12 | 0.221 | 0.231 | 0.74 | 0.76 | 0.035 | EIT-0216-22-00 | 4012-22-00 | |
| 12 | 0.221 | 0.231 | 0.882 | 0.898 | 0.035 | EIT-0216-24-00 | 4012-24-00 | |
| 1/4 | 0.256 | 0.267 | 0.68 | 0.685 | 0.035 | EIT-0250-20-00 | 4014-20-00 | |
| 1/4 | 0.256 | 0.267 | 0.725 | 0.76 | 0.035 | EIT-0250-22-00 | 4014-22-00 | -68 |
| 1/4 | 0.256 | 0.267 | 0.882 | 0.898 | 0.035 | EIT-0250-24-00 | 4014-24-00 | -69 |
| 1/4 | 0.256 | 0.267 | 0.882 | 0.898 | 0.045 | EIT-0250-24-01 | 4014-24-01 | |
| 1/4 | 0.256 | 0.267 | 0.965 | 0.985 | 0.039 | EIT-0250-00-01 | 4014-00-01 | -70 |
| 1/4 | 0.256 | 0.267 | 1.045 | 1.07 | 0.039 | EIT-0250-28-00 | 4014-28-00 | -71 |
| 5/16 | 0.32 | 0.332 | 0.865 | 0.9 | 0.035 | EIT-0312-24-00 | 4018-24-00 | -72 |
| 5/16 | 0.32 | 0.332 | 0.965 | 0.985 | 0.039 | EIT-0312-26-00 | 4018-26-00 | -73 |
| 5/16 | 0.32 | 0.332 | 1.045 | 1.07 | 0.045 | EIT-0312-28-00 | 4018-28-00 | -74 |
| 5/16 | 0.323 | 0.337 | 1.24 | 1.26 | 0.05 | EIT-0312-32-00 | 4018-32-00 | |
| 3/8 | 0.384 | 0.398 | 0.965 | 0.985 | 0.039 | EIT-0375-26-00 | 4020-26-00 | -76 |
| 3/8 | 0.384 | 0.398 | 0.965 | 0.985 | 0.05 | EIT-0375-26-01 | 4020-26-01 | |
| 3/8 | 0.384 | 0.398 | 1.045 | 1.07 | 0.045 | EIT-0375-28-00 | 4020-28-00 | -77 |
| 3/8 | 0.384 | 0.398 | 1.24 | 1.26 | 0.05 | EIT-0375-32-00 | 4020-32-00 | -79 |
| 7/16 | 0.448 | 0.464 | 1.045 | 1.07 | 0.045 | EIT-0437-28-00 | 4022-28-00 | |
| 7/16 | 0.448 | 0.463 | 1.13 | 1.155 | 0.045 | EIT-0437-30-00 | 4022-30-00 | |
| 7/16 | 0.448 | 0.463 | 1.24 | 1.26 | 0.05 | EIT-0437-32-00 | 4022-32-00 | |
| 1/2 | 0.512 | 0.53 | 1.22 | 1.26 | 0.05 | EIT-0500-32-00 | 4024-32-00* | -84 |
| 1/2 | 0.512 | 0.529 | 1.38 | 1.41 | 0.055 | EIT-0500-34-00 | 4024-34-00 | -86 |
| 1/2 | 0.512 | 0.529 | 1.59 | 1.62 | 0.062 | EIT-0500-36-00 | 4024-36-00 | |
| 9/16 | 0.576 | 0.596 | 1.38 | 1.43 | 0.055 | EIT-0562-34-00 | 4026-34-00 | |
| 5/8 | 0.64 | 0.663 | 1.38 | 1.41 | 0.055 | EIT-0625-35-00 | 4028-34-00 | |
| 5/8 | 0.64 | 0.659 | 1.59 | 1.62 | 0.062 | EIT-0625-36-00 | 4028-36-00 | -93 |
* Also available in Type B