Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, AF, Imperial, Metric, SAE
7/32 ", 6 mm, 5/16 ", 5.5 mm, 9/16 "
9.53, 25.4, 19.05, 12.5, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide