METRIK MFG
Metric Thread Chart
A selected shop reference for common metric M sizes and pitches, with terminology, tap-drill notes and ISO source links.
This is a selected shop reference for common ISO metric fastening threads. It is intentionally not a full reproduction of a standard.
Common coarse pitches
| Thread | Coarse pitch |
|---|---|
| M3 | 0.50 mm |
| M4 | 0.70 mm |
| M5 | 0.80 mm |
| M6 | 1.00 mm |
| M8 | 1.25 mm |
| M10 | 1.50 mm |
| M12 | 1.75 mm |
Selected fine pitches
| Thread | Fine pitch example |
|---|---|
| M4 | 0.50 mm |
| M5 | 0.50 mm |
| M6 | 0.75 mm |
| M8 | 1.00 mm |
| M10 | 1.25 mm |
| M12 | 1.50 mm |
Reading the callout
M8 × 1.25 │ │ │ └─ pitch = 1.25 mm └────── nominal diameter = 8 mm
A thread callout does not by itself define every tolerance or application requirement. Follow the drawing and applicable standard.
Standards: ISO 724:2023 specifies basic dimensions for ISO general-purpose metric threads. ISO 262:2023 specifies selected sizes for bolts, screws, studs and nuts.
| Report an error Tell us about a table entry. |
Suggest an update Request another thread series. |