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