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719_bkBKtk_b18.2.2-table4.jpg

Dimensions in inches (1 inch=25.4 mm) sourceASME B18.2.2 TABLE 4

Publication date : 2010

Nominal size or Bsic major dia. of the Thread
Nr. of threads x inch
G min
G max F min
F max
H min H max H1 min H1 max
UNC UNF
1/4
20 28
0.488
0.505 0.428 0.438 0.212 0.226 0.150 0.163
5/16
18 24
0.557
0.577 0.489 0.5 0.258 0.273 0.180 0.195
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-374
4



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