Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
9/32 ", 11/32 ", 4 mm, 6 mm, 9/16 "
3/4, 2-1/2, 1-1/2, 1/2, 3/8
25.4, 19.05, 38.1, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide