Internal Torx, External Hex, Hex, TX, External Torx
Torx, AF, Imperial, Metric, SAE
6 mm, 3/16 ", 5.5 mm, 9 mm, 7/16 "
38.1, 6.35, 19.05, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide