Internal Hex, External Hex, TX, Hex, 6-Point
AF, Imperial, Torx, SAE, Metric
9/32 ", 9/16 ", 15/16 ", 13 mm, 1-1/2 "
19.05, 38.1, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Phosphated, Oxidised, Black Phosphate, Black Oxide