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