Internal Torx, External Hex, External Torx, Hex, TX
Imperial, AF, Torx, SAE, Metric
7/16 ", 5 mm, 3/16 ", 5/16 ", 11/16 "
38.1, 9.53, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide