Nominal
Diamet &
Thread Size |
F |
C |
H |
ACROSS
FLATS |
ACROSS
CORNERS |
THICKNESS |
<
max |
min |
min |
max |
max |
min |
1/4 |
0.2500 |
0.428 |
0.438 |
0.488 |
0.505 |
0.150 |
0.163 |
5/16 |
0.3125 |
0.489 |
0.500 |
0.557 |
0.577 |
0.180 |
0.195 |
3/8 |
0.3750 |
0.551 |
0.562 |
0.628 |
0.650 |
0.210 |
0.227 |
7/16 |
0.4375 |
0.675 |
0.688 |
0.768 |
0.794 |
0.240 |
0.260 |
1/2 |
0.5000 |
0.736 |
0.750 |
0.840 |
0.866 |
0.302 |
0.323 |
9/16 |
0.5625 |
0.861 |
0.875 |
0.982 |
1.010 |
0.301 |
0.324 |
5/8 |
0.6250 |
0.922 |
0.938 |
1.051 |
1.083 |
0.363 |
0.387 |
3/4 |
0.7500 |
1.088 |
1.125 |
1.240 |
1.299 |
0.398 |
0.446 |
7/8 |
0.8750 |
1.269 |
1.312 |
1.447 |
1.516 |
0.458 |
0.510 |
1" |
1.0000 |
1.450 |
1.500 |
1.653 |
1.732 |
0.519 |
0.575 |
NOTE: Nuts which are 5/8" nominal size and smaller are double
chamfered. Those nuts larger than 5/8" nominal size may have either
a double chamfer or a washer faced bearing surface and a chamfered
top at manufacturer's option. The bearing surface is not included
when determining the nut thickness.
