M10 × 1.0 Tap Drill Size & Thread Specs
Everything for a M10 × 1.0 fine pitch thread on one page: tap drill (9 mm), clearance holes, wrench and hex key sizes, and the nearest inch thread.
SP-TD-01 · M10 × 1.0
M10 × 1.0 specs
SizePlate
M10 × 1.0 · tap with
9 mm drill
.3543″
9 mm · 77% thread
- Inch drill
- T · .3580
- Clearance
- 10.5 / 11 mm
- Wrench
- 16 mm
- Cap screw key
- 8 mm
Thread
- Nominal size
- M10 · .3937″
- Pitch
- 1 mm · 25.4 TPI
- Series
- fine
- coarse pitch
- M10 × 1.5
- fine pitch
- M10 × 1.25
Drilling
- Tap drill
- 9 mm · .3543
- Inch substitute
- T · .3580
- Close fit
- 10.5 mm
- Normal fit
- 11 mm
- Free fit
- 12 mm
Tools
- Hex head (ISO 4017)
- 16 mm
- Hex head (DIN 933)
- 17 mm
- Socket head cap key
- 8 mm
- Button head key
- 6 mm
- Flat head key
- 6 mm
Nearest inch
- Thread
- 3/8-16
- Major diameter
- .3750″
- Threads per inch
- 16
- Tap drill
- 5/16
- Interchangeable
- No
Not interchangeable means the threads look close but won't run together: forcing one into the other strips both.
Drill size by thread percentage
Larger drill, less thread, easier tapping. 75% is the usual target.
| Drill | Decimal | mm | Thread |
|---|---|---|---|
| 8.9 mm | .3504 | 8.9 | 85% |
| 9 mm | .3543 | 9 | 77% |
| T | .3580 | 9.09 | 70% |
| 9.1 mm | .3583 | 9.1 | 69% |
| 23/64 | .3594 | 9.13 | 67% |
| 9.2 mm | .3622 | 9.2 | 62% |
| 9.3 mm | .3661 | 9.3 | 54% |
| U | .3680 | 9.35 | 50% |
| 9.4 mm | .3701 | 9.4 | 46% |
Neighboring sizes
- M8 × 1.0tap 7 mm
- M10 × 1.5tap 8.5 mm
- M10 × 1.25tap 8.8 mm
- M12 × 1.75tap 10.2 mm
- M12 × 1.5tap 10.5 mm
- M12 × 1.25tap 10.8 mm
Questions
What does M10 × 1.0 mean?
An ISO metric thread with a 10 mm major diameter and a 1 mm pitch (the distance from one thread crest to the next). It’s the fine pitch for M10.
Can I use a T drill instead?
Usually. T is .3580″ against .3543″ for the 9 mm drill, which changes the thread engagement by a few percent at most.