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美制 规格
外径(mm)
3/16-32 BSF
25
1/4-28 UNF
38
5/16-24 UNF
3/8-24 UNF
7/16-20 UNF
1/2-20 UNF
1/4-20 UNC
5/16-18 UNC
3/8-16 UNC
1/2-13 UNC
2-56 UNC
3-48 UNC
4-40 UNC
6-32 UNC
8-32 UNC
10-24 UNC
10-32 UNF