External Hex, Internal Torx, Hex, TX, 6-Point
Imperial, Torx, Metric, AF, SAE
9/16 ", 5/16 ", 7/16 ", 1-1/2 ", 11/16 "
1/2, 1/4, 1, 1-1/2, 2-1/2
9.53, 25.4, 6.35, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide