Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Torx, Imperial, SAE, Metric
7/32 ", 7/16 ", 34 mm, 30 mm, 11/16 "
25.4, 9.53, 19.05, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide