Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Imperial, SAE, Metric
5/16 ", 7/32 ", 5/8 ", 11/16 ", 30 mm
1-1/2, 3/4, 1, 2-1/2, 1/2
9.53, 19.05, 38.1, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate