Home › Set / Grub Screws › M6
M6 set / grub screw size
3 mm Allen key
hex key size for M6 set screw
M6 set screw — Shaft collars, pulleys, gears.
Full specification
| System | Metric coarse |
| Nominal diameter | 6 mm |
| Thread pitch | 1.0 mm |
| Allen key / hex socket | 3 mm |
| Tap drill | 5.0 mm |
| Clearance hole | 6.6 mm |
| Common grade / class | 12.9 |
| Typical torque | 8 Nm (5.9 ft·lb) |
About M6 set screws
Shaft collars, pulleys, gears.
Set screws (also called grub screws) are headless screws with a hexagonal socket. They are used to secure an object within or against another object. Common applications include securing pulleys, gears, and collars to shafts.
Grade 12.9 indicates high-strength alloy steel for demanding applications.
Frequently asked questions
- What size Allen key fits M6 set screw?
- M6 set screw uses a 3 mm Allen key.
- What is the torque for M6 set screw?
- Typical torque for M6 set screw in 12.9 is about 8 Nm (5.9 ft·lb).
- What are set screws used for?
- M6 set screws are used in shaft collars, pulleys, gears.