Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
9/16 ", 5/16 ", 3/16 ", 5.5 mm, 11/16 "
3/4, 1/4, 2-1/2, 3/8, 1/2
38.1, 19.05, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide