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Internal Tooth Lockwashers

Internal Tooth Lockwashers


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Internal Tooth Lockwasher
  
  
 
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Internal Tooth Lockwashers

Work best with smaller head screws (such as fillister heads). Use where appearance warrants that teeth be hidden or where snagging or scratching could be a problem.

 
ASME B18.21.1-2009Internal Tooth Lockwashers
Nominal Washer Size Inside Diameter
Outside Diameter
Thickness
Max Min Max. Min. Max Min
#2 0.086 0.095 0.089 0.200 0.175 0.016 0.010
#3 0.099 0.109 0.102 0.232 0.215 0.016 0.010
#4 0.112 0.123 0.115 0.270 0.245 0.018 0.012
#5 0.125 0.136 0.129 0.280 0.255 0.020 0.014
#6 0.138 0.150 0.141 0.295 0.275 0.022 0.016
#8 0.164 0.176 0.168 0.340 0.325 0.023 0.018
#10 0.190 0.204 0.195 0.381 0.365 0.024 0.018
#12 0.216 0.231 0.221 0.410 0.394 0.027 0.020
1/4 0.250 0.267 0.256 0.478 0.460 0.028 0.023
5/6 0.312 0.332 0.320 0.610 0.594 0.034 0.028
3/8 0.375 0.398 0.384 0.692 0.670 0.040 0.032
7/16 0.438 0.464 0.448 0.789 0.740 0.040 0.032
1/2 0.500 0.530 0.512 0.900 0.867 0.045 0.037
9/16 0.5625 0.596 0.576 0.985 0.957 0.045 0.037
5/8 0.625 0.663 0.640 1.071 1.045 0.050 0.042
3/4 0.750 0.795 0.769 1.245 1.220 0.055 0.047
7/8 0.875 0.927 0.894 1.410 1.364 0.060 0.052
1 1.000 1.060 1.019 1.637 1.590 0.067 0.059
1 1/4 1.250 1.325 1.275 1.975 1.921 0.067 0.059
1/8 Pipe 0.425 0.410 0.615 0.595 0.022 0.017