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Hardened circular, clipped circular, and extra-thick washers

ASTM F 436 - 2011

Display drawing:

 *Models with different eras.

For thread diameter
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4
d
dc
h circular and clipped max
min
extra thick max
min
n min
0.281 0.344 0.406 0.469 0.531 0.625 0.688 0.813 0.938 1.063 1.188 1.375
0.625 0.688 0.813 0.922 1.063 1.188 1.313 1.468 1.750 2.000 2.250 2.500
0.080 0.080 0.080 0.080 0.177 0.177 0.177 0.177 0.177 0.177 0.177 0.177
0.051 0.051 0.051 0.051 0.097 0.110 0.122 0.122 0.136 0.136 0.136 0.136
/ / / / 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375
/ / / / 0.305 0.305 0.305 0.305 0.305 0.305 0.305 0.305
0.219 0.281 0.344 0.406 0.438 0.500 0.563 0.656 0.781 0.875 1.000 1.094
For thread diameter
1-3/8 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
d
dc
h circular and clipped max
min
extra thick max
min
n min
1.500 1.625 1.875 2.125 2.375 2.625 2.875 3.125 3.375 3.625 3.875 4.125
2.750 3.000 3.375 3.750 4.000 4.500 5.000 5.500 6.000 6.500 7.000 7.500
0.177 0.177 0.280 0.280 0.340 0.340 0.340 0.340 0.340 0.340 0.340 0.340
0.136 0.136 0.178 0.178 0.240 0.240 0.240 0.240 0.240 0.240 0.240 0.240
0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375
0.305 0.305 0.305 0.305 0.305 0.313 0.313 0.313 0.313 0.313 0.313 0.313
1.219 1.313 1.531 1.750 2.000 2.188 2.406 2.625 2.875 3.063 3.313 3.500
①,The n value is approximately equal to 0.875 times the nominal diameter of the washer.

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