ASTM A490
B7 :Alloy Steel
B8M : Stainless Steel 316
B8 : Stainless Steel 304
d x TPI
b
k
s
1/2 x 13UNC
1.00
5/16
7/8
5/8 x 13UNC
1.25
25/64
1 1/16
3/4 x 10UNC
1.38
15/32
1 1/4
7/8 x 9UNC
1.5
35/64
1 7/16
1 x 8UNC
1.75
39/64
1 5/8
1 1/8 x 7UNC
2
11/16
1 13/16
1 1/4 x 7UNC
25/32
1 3/8 x 6UNC
2.25
27/32
2 3/16
1 1/2 x 6UNC
15/16
2 3/8