Internal Torx, External Hex, TX, Hex, 6-Point
Torx, AF, Imperial, SAE, Metric
3/16 ", 16 mm, 14 mm, 11/16 ", 9 mm
1, 1-1/2, 2-1/2, 3/8, 1/2
38.1, 25.4, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Oxide, Black Phosphate