Nominal Size, Inches
F
G
H
Width Across Flats
Width Across Corners
Thickness
Max
Min
.25
.500
.488
.707
.64
.266
.218
.3125
.562
.546
.795
.72
.33
.28
.375
.688
.669
.973
.889
.393
.341
.4375
.750
.728
1.06
.97
.456
.403
.50
.875
.850
1.237
1.137
.52
.464
.625
1.062
1.031
1.503
1.386
.647
.587
.75
1.250
1.212
1.768
1.635
.774
.710
1.438
1.394
2.033
1.884
.901
.833
1.00
1.625
1.575
2.298
2.132
1.028
.956
1.125
1.812
1.756
2.563
2.381
1.155
1.079
1.25
2.00
1.938
2.828
2.631
1.282
1.187
1.375
2.188
2.119
3.094
2.879
1.409
1.31
1.50
2.375
2.300
3.359
3.128
1.536
1.433
