lw28-1Specifications: 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