Internal Hex, External Torx, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
7/16 ", 7/32 ", 1 ", 9 mm, 5/8 "
1, 1-1/2, 2-1/2, 3/8, 3/4
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate