Internal Hex, External Hex, Internal Torx, Hex, TX
Imperial, Torx, AF, Metric, SAE
5/16 ", 7/32 ", 10 mm, 9/16 ", 11/16 "
38.1, 9.53, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide