Internal Hex, External Hex, Internal Torx, Hex, TX
Imperial, Torx, AF, Metric, SAE
9/32 ", 15 mm, 5.5 mm, 5/16 ", 23 mm
25.4, 6.35, 19.05, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide