Internal Torx, External Hex, TX, Hex, External Torx
Imperial, AF, Metric, Torx, SAE
5/8 ", 3/16 ", 11 mm, 9/16 ", 29 mm
1, 1-1/2, 2-1/2, 1/4, 3/8
25.4, 9.53, 6.35, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide