Structural Bolt(Heavy Hex)

Nom. size
and
Threads
Per Inch

F

G

H

LT
Thread
Length

Width Across
Flats

Width Across
Corners

Height

Max

Min

Max

Min

Max

Min

Basic

1/2 - 13
5/8 - 11
3/4 - 10

0.845
1.062
1.250

0.850
1.031
1.212

1.010
1.227
1.443

0.969
1.175
1.383

0.323
0.403
0.483

0.302
0.378
0.455

1.00
1.25
1.38

7/8 - 9
1 - 8
1-1/8 - 7

1.438
1.625
1.812

1.394
1.575
1.756

1.660
1.876
2.093

1.589
1.796
2.002

0.563
0.627
0.718

0.531
0.591
0.658

1.50
1.75
2.00

1-1/4 - 7
1-3/8 - 6
1-1/2 - 6

2.000
2.188
2.375

1.938
2.119
2.300

2.309
2.526
2.742

2.209
2.416
2.622

0.813
0.878
0.974

0.749
0.810
0.902

2.00
2.25
2.25