External Hex, Internal Torx, TX, Hex, 6-Point
Imperial, Torx, AF, Metric, SAE
13/16 ", 7/16 ", 5/8 ", 11/16 ", 28 mm
1, 2-1/2, 1/2, 1-1/2, 3/8
38.1, 9.53, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Phosphatized, Oxidised, Black Phosphate, Black Oxide