Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Imperial, Metric, SAE
7/32 ", 9/32 ", 3/16 ", 5.5 mm, 1-1/2 "
3/8, 2-1/2, 1/4, 1/2, 3/4
38.1, 19.05, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide