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ASTM F436

ASTM F 436 - 2011 

Hardened circular

clipped circular

and extra-thick washers

           

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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