d
Threads per inch
b
e ≈ 1,25d
5/16
18
10
3/8
16
20
12
1/2
25/30
5/8
11
28
3/4
32
25
1.IN.
8
40/55
35
Thread
Material
Class
Packaging
Code
BSW
St
5.6/5.8
Standard
21540