Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Metric, AF, Torx, SAE
6 mm, 5.5 mm, 5/16 ", 5/8 ", 11/16 "
38.1, 9.53, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide