External Torx, Internal Torx, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
5/16 ", 7/16 ", 9/16 ", 5/8 ", 9 mm
38.1, 25.4, 19.05, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide