Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Torx, AF, SAE, Metric
6 mm, 11/16 ", 9/16 ", 3/16 ", 5/8 "
38.1, 12.5, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide