--- title: "Metric thread chart — tap drills and clearance holes" description: "Every metric thread size with its tap drill, clearance hole, hex size and torque. 42 sizes, coarse and fine." url: https://atoneplace.net/fastener/metric/ site: "At One Place" --- # Metric thread chart 42 metric thread sizes, with the drill to tap each one and the hole to clear it. | Thread | Pitch | Tap drill | Clearance | Hex | Torque | | --- | --- | --- | --- | --- | --- | | M1.6×0.35 | 0.35 mm | 1.25 mm | 1.7 mm | 3.2 mm | — | | M2×0.4 | 0.4 mm | 1.6 mm | 2.2 mm | 4 mm | — | | M2.5×0.45 | 0.45 mm | 2.05 mm | 2.7 mm | 5 mm | — | | M3×0.5 | 0.5 mm | 2.5 mm | 3.2 mm | 5.5 mm | 1.1–1.5 N·m | | M3.5×0.6 | 0.6 mm | 2.9 mm | 3.7 mm | 6 mm | 1.7–2.3 N·m | | M4×0.7 | 0.7 mm | 3.3 mm | 4.3 mm | 7 mm | 2.5–3.4 N·m | | M5×0.8 | 0.8 mm | 4.2 mm | 5.3 mm | 8 mm | 5–6.8 N·m | | M6×0.75 | 0.75 mm | 5.2 mm | 6.4 mm | 10 mm | 9.5–12.5 N·m | | M6×1 | 1 mm | 5 mm | 6.4 mm | 10 mm | 8.5–11.5 N·m | | M8×0.75 | 0.75 mm | 7.2 mm | 8.4 mm | 13 mm | 24–32 N·m | | M8×1 | 1 mm | 7 mm | 8.4 mm | 13 mm | 22–30 N·m | | M8×1.25 | 1.25 mm | 6.8 mm | 8.4 mm | 13 mm | 21–28 N·m | | M10×1 | 1 mm | 9 mm | 10.5 mm | 16 mm | 46–62 N·m | | M10×1.25 | 1.25 mm | 8.8 mm | 10.5 mm | 16 mm | 43–58 N·m | | M10×1.5 | 1.5 mm | 8.5 mm | 10.5 mm | 16 mm | 41–56 N·m | | M12×1 | 1 mm | 11 mm | 13 mm | 18 mm | 82–110 N·m | | M12×1.25 | 1.25 mm | 10.8 mm | 13 mm | 18 mm | 78–106 N·m | | M12×1.5 | 1.5 mm | 10.5 mm | 13 mm | 18 mm | 75–101 N·m | | M12×1.75 | 1.75 mm | 10.2 mm | 13 mm | 18 mm | 72–97 N·m | | M14×1.25 | 1.25 mm | 12.8 mm | 15 mm | 21 mm | 127–171 N·m | | M14×1.5 | 1.5 mm | 12.5 mm | 15 mm | 21 mm | 124–167 N·m | | M14×2 | 2 mm | 12 mm | 15 mm | 21 mm | 115–155 N·m | | M16×1.5 | 1.5 mm | 14.5 mm | 17 mm | 24 mm | 189–256 N·m | | M16×2 | 2 mm | 14 mm | 17 mm | 24 mm | 180–240 N·m | | M18×1.5 | 1.5 mm | 16.5 mm | 19 mm | 27 mm | 284–384 N·m | | M18×2.5 | 2.5 mm | 15.5 mm | 19 mm | 27 mm | 255–340 N·m | | M20×1.5 | 1.5 mm | 18.5 mm | 21 mm | 30 mm | 400–535 N·m | | M20×2 | 2 mm | 18 mm | 21 mm | 30 mm | 375–510 N·m | | M20×2.5 | 2.5 mm | 17.5 mm | 21 mm | 30 mm | 360–480 N·m | | M22×1.5 | 1.5 mm | 20.5 mm | 23 mm | 34 mm | 535–725 N·m | | M22×2.5 | 2.5 mm | 19.5 mm | 23 mm | 34 mm | 490–660 N·m | | M24×1.5 | 1.5 mm | 22.5 mm | 25 mm | 36 mm | 700–950 N·m | | M24×2 | 2 mm | 22 mm | 25 mm | 36 mm | 670–910 N·m | | M24×3 | 3 mm | 21 mm | 25 mm | 36 mm | 620–840 N·m | | M27×2 | 2 mm | 25 mm | 28 mm | 41 mm | 975–1320 N·m | | M27×3 | 3 mm | 24 mm | 28 mm | 41 mm | 910–1220 N·m | | M30×2 | 2 mm | 28 mm | 31 mm | 46 mm | 1350–1850 N·m | | M30×3.5 | 3.5 mm | 26.5 mm | 31 mm | 46 mm | 1250–1650 N·m | | M33×3.5 | 3.5 mm | 29.5 mm | 34 mm | 50 mm | 1700–2250 N·m | | M36×4 | 4 mm | 32 mm | 37 mm | 55 mm | 2300–2800 N·m | | M42×4.5 | 4.5 mm | 37.5 mm | 43 mm | 65 mm | 3450–4650 N·m | | M48×5 | 5 mm | 43 mm | 50 mm | 75 mm | 5150–6950 N·m | > Plain steel property class 8.8 or SAE grade 5, dry threads, tightened to about 65% of yield. Lubricated threads reach the same preload at 20-30% less torque. Where the manufacturer publishes a figure — spark plugs, wheel nuts, cylinder heads — use theirs. - [M1.6×0.35](https://atoneplace.net/fastener/m1-6-0-35/) — 1.25 mm tap drill - [M2×0.4](https://atoneplace.net/fastener/m2-0-4/) — 1.6 mm tap drill - [M2.5×0.45](https://atoneplace.net/fastener/m2-5-0-45/) — 2.05 mm tap drill - [M3×0.5](https://atoneplace.net/fastener/m3-0-5/) — 2.5 mm tap drill - [M3.5×0.6](https://atoneplace.net/fastener/m3-5-0-6/) — 2.9 mm tap drill - [M4×0.7](https://atoneplace.net/fastener/m4-0-7/) — 3.3 mm tap drill - [M5×0.8](https://atoneplace.net/fastener/m5-0-8/) — 4.2 mm tap drill - [M6×0.75](https://atoneplace.net/fastener/m6-0-75/) — 5.2 mm tap drill - [M6×1](https://atoneplace.net/fastener/m6-1/) — 5 mm tap drill - [M8×0.75](https://atoneplace.net/fastener/m8-0-75/) — 7.2 mm tap drill - [M8×1](https://atoneplace.net/fastener/m8-1/) — 7 mm tap drill - [M8×1.25](https://atoneplace.net/fastener/m8-1-25/) — 6.8 mm tap drill - [M10×1](https://atoneplace.net/fastener/m10-1/) — 9 mm tap drill - [M10×1.25](https://atoneplace.net/fastener/m10-1-25/) — 8.8 mm tap drill - [M10×1.5](https://atoneplace.net/fastener/m10-1-5/) — 8.5 mm tap drill - [M12×1](https://atoneplace.net/fastener/m12-1/) — 11 mm tap drill - [M12×1.25](https://atoneplace.net/fastener/m12-1-25/) — 10.8 mm tap drill - [M12×1.5](https://atoneplace.net/fastener/m12-1-5/) — 10.5 mm tap drill - [M12×1.75](https://atoneplace.net/fastener/m12-1-75/) — 10.2 mm tap drill - [M14×1.25](https://atoneplace.net/fastener/m14-1-25/) — 12.8 mm tap drill - [M14×1.5](https://atoneplace.net/fastener/m14-1-5/) — 12.5 mm tap drill - [M14×2](https://atoneplace.net/fastener/m14-2/) — 12 mm tap drill - [M16×1.5](https://atoneplace.net/fastener/m16-1-5/) — 14.5 mm tap drill - [M16×2](https://atoneplace.net/fastener/m16-2/) — 14 mm tap drill - [M18×1.5](https://atoneplace.net/fastener/m18-1-5/) — 16.5 mm tap drill - [M18×2.5](https://atoneplace.net/fastener/m18-2-5/) — 15.5 mm tap drill - [M20×1.5](https://atoneplace.net/fastener/m20-1-5/) — 18.5 mm tap drill - [M20×2](https://atoneplace.net/fastener/m20-2/) — 18 mm tap drill - [M20×2.5](https://atoneplace.net/fastener/m20-2-5/) — 17.5 mm tap drill - [M22×1.5](https://atoneplace.net/fastener/m22-1-5/) — 20.5 mm tap drill - [M22×2.5](https://atoneplace.net/fastener/m22-2-5/) — 19.5 mm tap drill - [M24×1.5](https://atoneplace.net/fastener/m24-1-5/) — 22.5 mm tap drill - [M24×2](https://atoneplace.net/fastener/m24-2/) — 22 mm tap drill - [M24×3](https://atoneplace.net/fastener/m24-3/) — 21 mm tap drill - [M27×2](https://atoneplace.net/fastener/m27-2/) — 25 mm tap drill - [M27×3](https://atoneplace.net/fastener/m27-3/) — 24 mm tap drill - [M30×2](https://atoneplace.net/fastener/m30-2/) — 28 mm tap drill - [M30×3.5](https://atoneplace.net/fastener/m30-3-5/) — 26.5 mm tap drill - [M33×3.5](https://atoneplace.net/fastener/m33-3-5/) — 29.5 mm tap drill - [M36×4](https://atoneplace.net/fastener/m36-4/) — 32 mm tap drill - [M42×4.5](https://atoneplace.net/fastener/m42-4-5/) — 37.5 mm tap drill - [M48×5](https://atoneplace.net/fastener/m48-5/) — 43 mm tap drill ## Sources - Official vendor product documentation — At One Place (/about/) - Typical range compiled from manufacturer specifications — At One Place (/about/)