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