Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
5/8 ", 9/16 ", 5/16 ", 25 mm, 29 mm
3/4, 1-1/2, 2-1/2, 1/2, 3/8
38.1, 12.5, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide