ISO Metric
ISO Metric Fine Thread, pitch 3
ISO metric threads have a 60° symmetric profile and are designated by M, the nominal diameter and, for fine threads, the pitch (e.g. M10 × 1).
- Standard
- DIN 13-8
- Flank angle
- 60°
- Sizes listed
- 117
- Range
- M 28.0 – M 300.0
| Nominal Diameter M | Pitch mm | Tapping Drill Size mm (D − P) | Minor Diameter D1 mm |
|---|---|---|---|
| M 28.0 | 3.00 | 25.0 | 24.75 |
| M 30.0 | 3.00 | 27.0 | 26.75 |
| M 32.0 | 3.00 | 29.0 | 28.75 |
| M 33.0 | 3.00 | 30.0 | 29.75 |
| M 34.0 | 3.00 | 31.0 | 30.75 |
| M 35.0 | 3.00 | 32.0 | 31.75 |
| M 36.0 | 3.00 | 33.0 | 32.75 |
| M 38.0 | 3.00 | 35.0 | 34.75 |
| M 39.0 | 3.00 | 36.0 | 35.75 |
| M 40.0 | 3.00 | 37.0 | 36.75 |
| M 42.0 | 3.00 | 39.0 | 38.75 |
| M 45.0 | 3.00 | 42.0 | 41.75 |
| M 48.0 | 3.00 | 45.0 | 44.75 |
| M 50.0 | 3.00 | 47.0 | 46.75 |
| M 52.0 | 3.00 | 49.0 | 48.75 |
| M 55.0 | 3.00 | 52.0 | 51.75 |
| M 56.0 | 3.00 | 53.0 | 52.75 |
| M 58.0 | 3.00 | 55.0 | 54.75 |
| M 60.0 | 3.00 | 57.0 | 56.75 |
| M 62.0 | 3.00 | 59.0 | 58.75 |
| M 64.0 | 3.00 | 61.0 | 60.75 |
| M 65.0 | 3.00 | 62.0 | 61.75 |
| M 68.0 | 3.00 | 65.0 | 64.75 |
| M 70.0 | 3.00 | 67.0 | 66.75 |
| M 72.0 | 3.00 | 69.0 | 68.75 |
| M 75.0 | 3.00 | 72.0 | 71.75 |
| M 76.0 | 3.00 | 73.0 | 72.75 |
| M 78.0 | 3.00 | 75.0 | 74.75 |
| M 80.0 | 3.00 | 77.0 | 76.75 |
| M 82.0 | 3.00 | 79.0 | 78.75 |
| M 85.0 | 3.00 | 82.0 | 81.75 |
| M 88.0 | 3.00 | 85.0 | 84.75 |
| M 90.0 | 3.00 | 87.0 | 86.75 |
| M 92.0 | 3.00 | 89.0 | 88.75 |
| M 95.0 | 3.00 | 92.0 | 91.75 |
| M 98.0 | 3.00 | 95.0 | 94.75 |
| M 100.0 | 3.00 | 97.0 | 96.75 |
| M 102.0 | 3.00 | 99.0 | 98.75 |
| M 105.0 | 3.00 | 102.0 | 101.75 |
| M 108.0 | 3.00 | 105.0 | 104.75 |
| M 110.0 | 3.00 | 107.0 | 106.75 |
| M 112.0 | 3.00 | 109.0 | 108.75 |
| M 115.0 | 3.00 | 112.0 | 111.75 |
| M 118.0 | 3.00 | 115.0 | 114.75 |
| M 120.0 | 3.00 | 117.0 | 116.75 |
| M 122.0 | 3.00 | 119.0 | 118.75 |
| M 125.0 | 3.00 | 122.0 | 121.75 |
| M 128.0 | 3.00 | 125.0 | 124.75 |
| M 130.0 | 3.00 | 127.0 | 126.75 |
| M 132.0 | 3.00 | 129.0 | 128.75 |
| M 135.0 | 3.00 | 132.0 | 131.75 |
| M 138.0 | 3.00 | 135.0 | 134.75 |
| M 140.0 | 3.00 | 137.0 | 136.75 |
| M 142.0 | 3.00 | 139.0 | 138.75 |
| M 145.0 | 3.00 | 142.0 | 141.75 |
| M 148.0 | 3.00 | 145.0 | 144.75 |
| M 150.0 | 3.00 | 147.0 | 146.75 |
| M 152.0 | 3.00 | 149.0 | 148.75 |
| M 155.0 | 3.00 | 152.0 | 151.75 |
| M 158.0 | 3.00 | 155.0 | 154.75 |
| M 160.0 | 3.00 | 157.0 | 156.75 |
| M 162.0 | 3.00 | 159.0 | 158.75 |
| M 165.0 | 3.00 | 162.0 | 161.75 |
| M 168.0 | 3.00 | 165.0 | 164.75 |
| M 170.0 | 3.00 | 167.0 | 166.75 |
| M 172.0 | 3.00 | 169.0 | 168.75 |
| M 175.0 | 3.00 | 172.0 | 171.75 |
| M 178.0 | 3.00 | 175.0 | 174.75 |
| M 180.0 | 3.00 | 177.0 | 176.75 |
| M 182.0 | 3.00 | 179.0 | 178.75 |
| M 185.0 | 3.00 | 182.0 | 181.75 |
| M 188.0 | 3.00 | 185.0 | 184.75 |
| M 190.0 | 3.00 | 187.0 | 186.75 |
| M 192.0 | 3.00 | 189.0 | 188.75 |
| M 195.0 | 3.00 | 192.0 | 191.75 |
| M 198.0 | 3.00 | 195.0 | 194.75 |
| M 200.0 | 3.00 | 197.0 | 196.75 |
| M 202.0 | 3.00 | 199.0 | 198.75 |
| M 205.0 | 3.00 | 202.0 | 201.75 |
| M 208.0 | 3.00 | 205.0 | 204.75 |
| M 210.0 | 3.00 | 207.0 | 206.75 |
| M 212.0 | 3.00 | 209.0 | 208.75 |
| M 215.0 | 3.00 | 212.0 | 211.75 |
| M 218.0 | 3.00 | 215.0 | 214.75 |
| M 220.0 | 3.00 | 217.0 | 216.75 |
| M 222.0 | 3.00 | 219.0 | 218.75 |
| M 225.0 | 3.00 | 222.0 | 221.75 |
| M 228.0 | 3.00 | 225.0 | 224.75 |
| M 230.0 | 3.00 | 227.0 | 226.75 |
| M 232.0 | 3.00 | 229.0 | 228.75 |
| M 235.0 | 3.00 | 232.0 | 231.75 |
| M 238.0 | 3.00 | 235.0 | 234.75 |
| M 240.0 | 3.00 | 237.0 | 236.75 |
| M 242.0 | 3.00 | 239.0 | 238.75 |
| M 245.0 | 3.00 | 242.0 | 241.75 |
| M 248.0 | 3.00 | 245.0 | 244.75 |
| M 250.0 | 3.00 | 247.0 | 246.75 |
| M 252.0 | 3.00 | 249.0 | 248.75 |
| M 255.0 | 3.00 | 252.0 | 251.75 |
| M 258.0 | 3.00 | 255.0 | 254.75 |
| M 260.0 | 3.00 | 257.0 | 256.75 |
| M 262.0 | 3.00 | 259.0 | 258.75 |
| M 265.0 | 3.00 | 262.0 | 261.75 |
| M 268.0 | 3.00 | 265.0 | 264.75 |
| M 270.0 | 3.00 | 267.0 | 266.75 |
| M 272.0 | 3.00 | 269.0 | 268.75 |
| M 275.0 | 3.00 | 272.0 | 271.75 |
| M 278.0 | 3.00 | 275.0 | 274.75 |
| M 280.0 | 3.00 | 277.0 | 276.75 |
| M 282.0 | 3.00 | 279.0 | 278.75 |
| M 285.0 | 3.00 | 282.0 | 281.75 |
| M 288.0 | 3.00 | 285.0 | 284.75 |
| M 290.0 | 3.00 | 287.0 | 286.75 |
| M 292.0 | 3.00 | 289.0 | 288.75 |
| M 295.0 | 3.00 | 292.0 | 291.75 |
| M 298.0 | 3.00 | 295.0 | 294.75 |
| M 300.0 | 3.00 | 297.0 | 296.75 |
Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.