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Washers

External Tooth Washers

Dimensions of External Tooth Lock Washers

Nominal Washer Size A B C
Inside Diameter Outside Diameter Thickness
Max Min Max Min Max Min
No. 3 (0.099) 0.109 0.102 0.235 0.220 0.016 0.010
No. 4 (0.112) 0.123 0.115 0.260 0.245 0.018 0.012
No. 5 (0.125) 0.136 0.129 0.285 0.270 0.020 0.014
No. 6 (0.138) 0.150 0.141 0.320 0.305 0.022 0.016
No. 8 (0.164) 0.176 0.168 0.381 0.365 0.023 0.018
No. 10 (0.190) 0.204 0.195 0.410 0.395 0.024 0.018
No . 12 (0.216) 0.231 0.221 0.475 0.460 0.027 0.020
1/4 (0.250) 0.267 0.256 0.510 0.494 0.028 0.023
5/16 (0.3125) 0.332 0.320 0.610 0.588 0.034 0.028
3/8 (0.375) 0.398 0.384 0.694 0.670 0.040 0.032
7/16 (0.4375) 0.464 0.448 0.760 0.740 0.040 0.032
1/2 (0.500) 0.530 0.513 0.900 0.880 0.045 0.037
9/16 (0.5625) 0.596 0.576 0.985 0.960 0.045 0.037
5/8 (0.625) 0.663 0.641 1.070 1.045 0.050 0.042
11/16 (0.6875) 0.728 0.704 1.155 1.130 0.050 0.042
3/4 (0.750) 0.795 0.768 1.260 1.220 0.055 0.047
13/16 (0.8125) 0.861 0.833 1.315 1.290 0.055 0.047
7/8 (0.875) 0.927 0.897 1.410 1.380 0.060 0.052
1 (1 .000) 1.060 1.025 1.620 1.590 0.067 0.059

Dimensions of Counter Sunk External Tooth Lock Washers

Nominal Washer Size A B C D
Inside Diameter Outside Diameter Thinkness Length
Max Min Ref Max Min Max Min
No. 4 (0.112) 0.123 0.113 0.213 0.019 0.015 0.065 0.050
No. 6 (0.138) 0.150 0.140 0.289 0.021 0.017 0.092 0.082
No. 8 (0.164) 0.177 0.167 0.322 0.021 0.017 0.099 0.083
No. 10 (0.190) 0.205 0.195 0.354 0.025 0.020 0.105 0.088
No. 12 (0.216) 0.231 0.220 0.421 0.025 0.020 0.128 0.113
1/4 (0.250) 0.267 0.255 0.454 0.025 0.020 0.128 0.118
No. 16 (0.268) 0.287 0.273 0.505 0.028 0.023 0.147 0.137
5/16 (0.312) 0.333 0.318 0.599 0.028 0.023 0.192 0.165
3/8 (0.375) 0.398 0.383 0.765 0.034 0.028 0.255 0.242
7/16 (0.438) 0.463 0.448 0.867 0.045 0.037 0.270 0.260
1/2 (0.500) 0.529 0.512 0.976 0.045 0.037 0.304 0.294