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US Nut Size Table

Size Diam.* Height
Hex Nut Machine Screw Nut Hex Nut Jam Nut Nylock Nut Machine Screw Nut
0 - 5/32 - - - 3/64
1 - 5/32 - - - 3/64
2 - 3/16 - - 9/64 1/16
3 - 3/16 - - 9/64 1/16
4 - 1/4 - - 9/64 3/32
6 - 5/16 - - 11/64 7/64
8 - 11/32 - - 15/64 1/8
10 - 3/8 - - 15/64 1/8
12 - 7/16 - - 5/16 5/32
1/4 7/16 7/16 7/32 5/32 5/16 3/16
5/16 1/2 9/16 17/64 3/16 11/32 7/32
3/8 9/16 5/8 21/64 7/32 29/64 1/4
7/16 11/16 - 3/8 1/4 29/64 -
1/2 3/4 - 7/16 5/16 19/32 -
9/16 7/8 - 31/64 5/16 41/64 -
5/8 15/16 - 35/64 3/8 3/4 -
3/4 1-1/8 - 41/64 27/64 7/8 -
7/8 1-5/16 - 3/4 31/64 63/64 -
1 1-1/2 - 55/64 35/64 1-3/64 -
* This is the diameter across the flats. It is also the size of wrench to use.

 

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