Internal Hex, External Hex, Internal Torx, TX, Hex
Torx, Imperial, AF, SAE, Metric
5/8 ", 25 mm, 28 mm, 30 mm, 11/16 "
19.05, 38.1, 9.53, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide