Part No.
Size
Thead A
H
H1
Hex1
Hex2
20.42.04
1/4"
7/16-20
.508
2.72
0.67
0.43
20.42.05
5/16"
1/2-20
.508
2.87
0.75
0.51
20.42.06
3/8"
9/16-18
.508
2.99
0.75
0.55
20.42.08
1/2"
3/4-16
.508
3.7
0.87
0.75
20.42.10
5/8"
7/8-16
.508
3.94
1.06
0.87
20.42.12
3/4"
1-1/16-12
.508
4.25
1.26
1.06
20.42.16
1"
1-5/16-12
.508
5.08
1.61
1.30
20.42.20
1 1/4"
1-5/8-12
.508
5.12
1.97
1.61
20.42.24
1 1/2"
1-7/8-12
.508
5.67
2.36
1.89

 

Dimensions are in inches, except as noted.