Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Torx, Metric, SAE
3/8 ", 5/16 ", 14 mm, 11/16 ", 10 mm
3/4, 2-1/2, 1/2, 1/4, 3/8
19.05, 6.35, 12.5, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide