- 4 piece chrome molybdenum taps: M13x1.5 / M15x1.5 / M17x1.5 / M20x1.5 - 5 screws each: M13x1.5 / M15x1.5 / M17x1.5 / M20x1.5 - 10 aluminum washers each: 13 - 15 - 17 - 20 mm