Threads / Series directory
Metric fine
thread sizes.
24 distinct nominal diameter–pitch combinations. Open a size for its differences and exact next steps.
Choose the complete designation
13 of 24 sizes have a matching reviewed drill-chart row. Other sizes provide an equation estimate with no rounded drill recommendation.
Swipe to see all columns →
| Designation | Major Ø · in / mm | TPI | Pitch · mm | Drill evidence | Next step |
|---|---|---|---|---|---|
| M3x0.35 Metric fine | 0.11811 / 3 | 72.571429 converted | 0.35 | Chart row | Tap-drill lookup → |
| M4x0.5 Metric fine | 0.15748 / 4 | 50.8 converted | 0.5 | Chart row | Tap-drill lookup → |
| M5x0.5 Metric fine | 0.19685 / 5 | 50.8 converted | 0.5 | Chart row | Tap-drill lookup → |
| M6x0.75 Metric fine | 0.23622 / 6 | 33.866667 converted | 0.75 | Chart row | Tap-drill lookup → |
| M8x1 Metric fine | 0.314961 / 8 | 25.4 converted | 1 | Chart row | Tap-drill lookup → |
| M10x1 Metric fine | 0.393701 / 10 | 25.4 converted | 1 | Chart row | Tap-drill lookup → |
| M10x1.25 Metric fine | 0.393701 / 10 | 20.32 converted | 1.25 | Chart row | Tap-drill lookup → |
| M12x1.25 Metric fine | 0.472441 / 12 | 20.32 converted | 1.25 | Equation only | Tap-drill lookup → |
| M12x1.5 Metric fine | 0.472441 / 12 | 16.933333 converted | 1.5 | Chart row | Tap-drill lookup → |
| M14x1.5 Metric fine | 0.551181 / 14 | 16.933333 converted | 1.5 | Chart row | Tap-drill lookup → |
| M16x1.5 Metric fine | 0.629921 / 16 | 16.933333 converted | 1.5 | Chart row | Tap-drill lookup → |
| M18x1.5 Metric fine | 0.708661 / 18 | 16.933333 converted | 1.5 | Chart row | Tap-drill lookup → |
| M18x2 Metric fine | 0.708661 / 18 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M20x1.5 Metric fine | 0.787402 / 20 | 16.933333 converted | 1.5 | Chart row | Tap-drill lookup → |
| M20x2 Metric fine | 0.787402 / 20 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M22x2 Metric fine | 0.866142 / 22 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M24x2 Metric fine | 0.944882 / 24 | 12.7 converted | 2 | Chart row | Tap-drill lookup → |
| M27x2 Metric fine | 1.062992 / 27 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M30x2 Metric fine | 1.181102 / 30 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M33x2 Metric fine | 1.299213 / 33 | 12.7 converted | 2 | Equation only | Tap-drill lookup → |
| M36x3 Metric fine | 1.417323 / 36 | 8.466667 converted | 3 | Equation only | Tap-drill lookup → |
| M39x3 Metric fine | 1.535433 / 39 | 8.466667 converted | 3 | Equation only | Tap-drill lookup → |
| M42x3 Metric fine | 1.653543 / 42 | 8.466667 converted | 3 | Equation only | Tap-drill lookup → |
| M48x3 Metric fine | 1.889764 / 48 | 8.466667 converted | 3 | Equation only | Tap-drill lookup → |
Before treating a size as a match
Confirm pitch, thread profile and complete drawing requirements. A nominal diameter match does not establish mating compatibility.
Read the designation and class →