Metric Tap Size Chart - FREE TECHNICAL CHARTS

1 Metric Tap size Chart Tap size Diameter (in) Diameter (mm) Thread count (TPI) Thread pitch (mm) Tap drill size ~127 mm ~102 mm ~102 mm ~127 mm ~127 1 mm ~102 mm ~127 mm ~85 mm ~127 mm ~73 mm ~127 mm ~73 mm ~102 mm ~64 mm ~102 mm ~57 mm ~73 mm ~57 mm ~73 mm ~51 mm ~73 mm ~43 mm ~73 mm ~51 mm ~37 mm ~51 4 mm ~34 mm Tap size Diameter (in) Diameter (mm) Thread count (TPI) Thread pitch (mm) Tap drill size ~51 mm ~32 mm ~51 5 mm ~51 mm ~34 mm M6x1 ~26 5 mm ~34 mm M7x1 ~26 6 mm ~51 mm ~34 mm M8x1 ~26 7 mm ~21 mm ~34 mm M9x1 ~26 8 mm ~21 mm ~34 mm ~17 mm ~21 mm M10x1 ~26 9 mm ~34 mm M11x1 ~26 10 mm ~17 mm ~17 mm ~15 mm ~34 mm M12x1 ~26 11 mm ~21 mm ~17 mm ~21 mm M14x1 ~26 13 mm Tap size Diameter (in) Diameter (mm) Thread count (TPI) Thread pitch (mm)

2 Tap drill size M14x2 ~13 12 mm M15x1 ~26 14 mm ~17 mm M16x2 ~13 14 mm ~17 mm M16x1 ~26 15 mm M17x1 ~26 16 mm ~17 mm ~11 mm M18x1 ~26 17 mm ~17 mm M18x2 ~13 16 mm M20x2 ~13 18 mm ~17 mm M20x1 ~26 19 mm ~11 mm M22x2 ~13 20 mm ~17 mm M22x1 ~26 21 mm ~11 mm M24x3 ~9 21 mm M24x1 ~26 23 mm ~17 mm M24x2 ~13 22 mm M25x2 ~13 23 mm M25x1 ~26 24 mm ~17 mm ~17 mm ~17 mm M27x3 ~9 24 mm Tap size Diameter (in) Diameter (mm) Thread count (TPI) Thread pitch (mm) Tap drill size M27x1 ~26 26 mm M27x2 ~13 25 mm M28x2 ~13 26 mm M28x1 ~26 27 mm ~17 mm ~17 mm ~8 mm M30x2 ~13 28 mm M33x2 ~13 31 mm ~8 mm M36x3 ~9 33 mm M36x4 ~7 32 mm M39x4 ~7 35 mm M39x3 ~9 36 mm ~6 mm ~6 mm M48x5 ~6 43 mm M52x5 ~6 47 mm ~5 mm ~5 mm