FINISHED HEX NUT

 

Nominal Diamet &
Thread Size
F
C
H
ACROSS
FLATS
ACROSS
CORNERS
THICKNESS
max
min
min
max
max
min
1/4
.25
0.428
0.438
0.488
0.505
0.212
0.226
5/16
.3125
0.489
0.500
0.557
0.577
0.258
0.273
3/8
.375
0.551
0.562
0.628
0.650
0.320
0.337
7/16
.4375
0.675
0.688
0.768
0.794
0.365
0.385
1/2
.5
0.736
0.750
0.840
0.866
0.427
0.448
9/16
.5625
0.861
0.875
0.982
1.010
0.473
0.496
5/8
.625
0.922
0.938
1.051
1.083
0.535
0.559
3/4
.75
1.088
1.125
1.240
1.299
0.617
0.665
7/8
0.8750
1.269
1.312
1.447
1.516
0.724
0.776
1"
1.0000
1.450
1.500
1.653
1.732
0.831
0.887

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.
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