Hex Nut

Pitch B C H Basic Tolerance Basic Basic Tolerance PF1/4 19 19 0-0.2 21.9 7 0-0.2 PF3/8 19 22 - 25.4 8 - PF1/2 14 27 0-0.3 31.1 9 - UNF7/16 20 14.2 0-0.2 16.4 7 - UNF1/2 20 19 - 21.9 7 - UNF9/16 18 19 - - 7 - UNF11/16 16 22 - 25.4 8 - UNF3/14 16 24 0-0.3 27.7 8 - UNF7/8 16 27 31.1 9 - M10 1.5 17 0-0.2 19.6 8 - M12 1 19 - 21.9 8 - M14 1.5 17 16.1 7 - M14 1.5 22 - 25.4 8 - M15 1.5 22 - 11 - M16 1 24 0-0.3 27.7 8 - M18 1.5 24 - - 10 - M18 1.5 24 - - 8 - M20 1.5 27 - 31.1 10 - 0.669 20 24 - - 8