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Dimensions in inches (1 inch=25.4 mm) sourceASME B18.2.2 2010 table 13 - hex coupling nuts

d Thread size

UNC (nr of threads x inch)

UNF (nr of threads x inch)

F basic G min H basic
inches mm
6 3.51 32 40 0.312 0.344 0.5
8 4.17 32 36 0.312 0.344 0.625
10 4.83 24 32 0.312 0.344 0.75
1/4
6.35 20 28 0.438 0.488 1.75
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
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
3-3/4
4
4-1/4
4-1/2
4-3/4
5
5-1/4
5-1/2
5-3/4
6



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