M6 × 1.0 Tap Drill Size & Thread Specs
Everything for a M6 × 1.0 coarse pitch thread on one page: tap drill (5 mm), clearance holes, wrench and hex key sizes, and the nearest inch thread.
SP-TD-01 · M6 × 1.0
M6 × 1.0 specs
SizePlate
M6 × 1.0 · tap with
5 mm drill
.1969″
5 mm · 77% thread
- Inch drill
- #9 · .1960
- Clearance
- 6.4 / 6.6 mm
- Wrench
- 10 mm
- Cap screw key
- 5 mm
Thread
- Nominal size
- M6 · .2362″
- Pitch
- 1 mm · 25.4 TPI
- Series
- coarse
- fine pitch
- M6 × 0.75
Drilling
- Tap drill
- 5 mm · .1969
- Inch substitute
- #9 · .1960
- Close fit
- 6.4 mm
- Normal fit
- 6.6 mm
- Free fit
- 7 mm
Tools
- Hex head (ISO 4017)
- 10 mm
- Hex head (DIN 933)
- 10 mm
- Socket head cap key
- 5 mm
- Button head key
- 4 mm
- Flat head key
- 4 mm
Nearest inch
- Thread
- 1/4-20
- Major diameter
- .2500″
- Threads per inch
- 20
- Tap drill
- #7
- 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 |
|---|---|---|---|
| 4.9 mm | .1929 | 4.9 | 85% |
| #10 | .1935 | 4.91 | 84% |
| #9 | .1960 | 4.98 | 79% |
| 5 mm | .1969 | 5 | 77% |
| #8 | .1990 | 5.05 | 73% |
| 5.1 mm | .2008 | 5.1 | 69% |
| #7 | .2010 | 5.11 | 69% |
| 13/64 | .2031 | 5.16 | 65% |
| #6 | .2040 | 5.18 | 63% |
| 5.2 mm | .2047 | 5.2 | 62% |
| #5 | .2055 | 5.22 | 60% |
| 5.3 mm | .2087 | 5.3 | 54% |
| #4 | .2090 | 5.31 | 53% |
| 5.4 mm | .2126 | 5.4 | 46% |
| #3 | .2130 | 5.41 | 45% |
Neighboring sizes
- M4 × 0.5tap 3.5 mm
- M5 × 0.8tap 4.2 mm
- M5 × 0.5tap 4.5 mm
- M6 × 0.75tap 5.2 mm
- M8 × 1.25tap 6.8 mm
- M8 × 1.0tap 7 mm
Questions
What does M6 × 1.0 mean?
An ISO metric thread with a 6 mm major diameter and a 1 mm pitch (the distance from one thread crest to the next). It’s the coarse pitch for M6.
Can I use a #9 drill instead?
Usually. #9 is .1960″ against .1969″ for the 5 mm drill, which changes the thread engagement by a few percent at most.