Internal Hex, External Hex, Internal Torx, Hex, TX
Metric, Torx, Imperial, AF, SAE
5/16 ", 7/8 ", 10 mm, 7/16 ", 5/8 "
25.4, 6.35, 19.05, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate