Internal Hex, External Hex, Internal Torx, TX, Hex
Imperial, AF, Torx, SAE, Metric
3/16 ", 5/16 ", 5/8 ", 11/16 ", 11 mm
3/4, 1, 1-1/2, 2-1/2, 3/8
38.1, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide