Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, Metric, Imperial, AF, SAE
8 mm, 9/16 ", 23 mm, 30 mm, 1-1/2 "
1-1/2, 3/4, 2-1/2, 1/2, 3/8
38.1, 9.53, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide