Internal Hex, External Hex, Internal Torx, TX, Hex
AF, Metric, Imperial, Torx, SAE
9/32 ", 5/16 ", 15/16 ", 5/8 ", 29 mm
3/4, 1, 1-1/2, 2-1/2, 1/2
38.1, 9.53, 25.4, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide