M6 × 0.75 Tap Drill Size & Thread Specs
Everything for a M6 × 0.75 fine pitch thread on one page: tap drill (5.2 mm), clearance holes, wrench and hex key sizes, and the nearest inch thread.
SP-TD-01 · M6 × 0.75
M6 × 0.75 specs
SizePlate
M6 × 0.75 · tap with
5.2 mm drill
.2047″
5.2 mm · 82% thread
- Inch drill
- #6 · .2040
- Clearance
- 6.4 / 6.6 mm
- Wrench
- 10 mm
- Cap screw key
- 5 mm
Thread
- Nominal size
- M6 · .2362″
- Pitch
- 0.75 mm · 33.9 TPI
- Series
- fine
- coarse pitch
- M6 × 1.0
Drilling
- Tap drill
- 5.2 mm · .2047
- Inch substitute
- #6 · .2040
- 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 |
|---|---|---|---|
| #6 | .2040 | 5.18 | 84% |
| 5.2 mm | .2047 | 5.2 | 82% |
| #5 | .2055 | 5.22 | 80% |
| 5.3 mm | .2087 | 5.3 | 72% |
| #4 | .2090 | 5.31 | 71% |
| 5.4 mm | .2126 | 5.4 | 62% |
| #3 | .2130 | 5.41 | 61% |
| 5.5 mm | .2165 | 5.5 | 51% |
| 7/32 | .2188 | 5.56 | 45% |
Neighboring sizes
- M5 × 0.8tap 4.2 mm
- M5 × 0.5tap 4.5 mm
- M6 × 1.0tap 5 mm
- M8 × 1.25tap 6.8 mm
- M8 × 1.0tap 7 mm
- M10 × 1.5tap 8.5 mm
Questions
What does M6 × 0.75 mean?
An ISO metric thread with a 6 mm major diameter and a 0.75 mm pitch (the distance from one thread crest to the next). It’s the fine pitch for M6.
Can I use a #6 drill instead?
Usually. #6 is .2040″ against .2047″ for the 5.2 mm drill, which changes the thread engagement by a few percent at most.