Tap size | Basic major | Basic major dia | mm per thread | Drill size | Drill size |
dia (mm) | (inch) | (mm) | (inch) | ||
M1.6 x 0.35 | 1,6mm | 0.063 | 0.35 | 1,25mm | #55 |
M2 x 0.4 | 2mm | 0.0787 | 0.4 | 1,6mm | #52 |
M2.5 x 0.45 | 2,5mm | 0.0984 | 0.45 | 2,05mm | #46 |
M3 x 0.5 | 3mm | 0.1181 | 0.5 | 2,5mm | #39 |
M3.5 x 0.6 | 3,5mm | 0.1378 | 0.6 | 2,9mm | #32 |
M4 x 0.7 | 4mm | 0.1575 | 0.7 | 3,3mm | #30 |
M5 x 0.8 | 5mm | 0.1969 | 0.8 | 4,2mm | #19 |
M6 x 1 | 6mm | 0.2362 | 1 | 5mm | #8 |
M8 x 1.25 | 8mm | 0.315 | 1.25 | 6,8mm | H |
M8 x 1 | 8mm | 0.315 | 1 | 7mm | J |
M10 x 1.5 | 10mm | 0.3937 | 1.5 | 8,5mm | R |
M10 x 1.25 | 10mm | 0.3937 | 1.25 | 8,8mm | 11/32 |
M12 x 1.75 | 12mm | 0.4724 | 1.75 | 10,2mm | 13/32 |
M12 x 1.25 | 12mm | 0.4724 | 1.25 | 10,8mm | 27/64 |
M14 x 2 | 14mm | 0.5512 | 2 | 12mm | 15/32 |
M14 x 1.5 | 14mm | 0.5512 | 1.5 | 12,5mm | 1/2 |
M16 x 2 | 16mm | 0.6299 | 2 | 14mm | 35/64 |
M16 x 1.5 | 16mm | 0.6299 | 1.5 | 14,5mm | 37/64 |
M18 x 2.5 | 18mm | 0.7087 | 2.5 | 15,5mm | 39/64 |
M18 x 1.5 | 18mm | 0.7087 | 1.5 | 16,5mm | 21/32 |
M20 x 2.5 | 20mm | 0.7874 | 2.5 | 17,5mm | 11/16 |
M20 x 1.5 | 20mm | 0.7874 | 1.5 | 18,5mm | 47/64 |
M22 x 2.5 | 22mm | 0.8661 | 2.5 | 19,5mm | 49/64 |
M22 x 1.5 | 22mm | 0.8661 | 1.5 | 20,5mm | 13/16 |
M24 x 3 | 24mm | 0.9449 | 3 | 21mm | 53/64 |
M24 x 2 | 24mm | 0.9449 | 2 | 22mm | 7/8 |
M27 x 3 | 27mm | 1.063 | 3 | 24mm | 15/16 |
M27 x 2 | 27mm | 1.063 | 2 | 25mm | 1 |