Internal Torx, External Hex, TX, Hex, External Torx
AF, Metric, Imperial, Torx, SAE
7/32 ", 7/16 ", 5/8 ", 5 mm, 5/16 "
19.05, 6.35, 25.4, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide