plastic training panties thread rolling machine：Metric Standard Thread Length for Bolts
Bolt Diameter
Standard Thread Length (mm) *
3
12
-
4
14
-
5
16
22
6
18
24
7
20
26
8
22
28
10
26
32
12
30
36
14
34
40
16
38
44
18
42
48
20
46
52
plastic training panties thread rolling machine：Metric Standard Thread Length for Bolts