M8 × 1.25 tap-drill size
The cutting-tap recommendation and thread dimensions for M8 × 1.25.
- Basic major diameter
- 8 mm
- Pitch
- 1.25 mm
- Thread family
- Metric threads · Coarse
- Thread form
- 60° · parallel
What this measurement means
The recommended 6.8 mm hole is a drilling dimension. The thread’s 8 mm basic major diameter describes a different part of the thread geometry. The interactive chart can centre either one while retaining the full designation.
This recommendation is attached to M8 × 1.25 in the source data. It is not inferred from the closest drill size or calculated from a diameter-minus-pitch estimate.
Explore the thread diameterRecommendations vary with material, engagement and tool. These values are transcribed from the Alpha / Sterling chart, not calculated by subtracting pitch. They are not intended for forming taps. A nearby catalogue drill is a dimensional comparison, not a substitute recommendation.
Other pitches at this diameter
These entries share a basic major diameter. Their pitches and tapping recommendations remain distinct.
| Thread & major diameter | Tap drill Open on chart ↗ |
|---|---|
M8 × 1.25Basic major Ø 8 mm · coarse | Ø 6.8 mm |
M8 × 1Basic major Ø 8 mm · fine | Ø 7 mm |
Sources & scope
Data edition 1.0. Values come from the reference sources below. SizeAxis is a selected reference catalogue; it does not certify manufactured dimensions or thread compatibility.
Read the measurement definitions and full coverage