Internal Hex, External Hex, TX, Hex, External Torx
Imperial, AF, Metric, Torx, SAE
5/8 ", 34 mm, 28 mm, 9 mm, 11/16 "
38.1, 6.35, 19.05, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide