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M10 set screw size
5 mm hex key
Allen / internal hex key size for M10 grub
M10 set screw — large couplings and machine parts.
Full specification
| System | Metric (45H) |
| Nominal diameter | 10 mm |
| Thread pitch | 1.5 mm |
| Hex key (Allen) | 5 mm |
| Tap drill | 8.5 mm |
| Clearance hole | n/a (threaded) |
| Common grade / class | 45H |
| Typical torque | 27 Nm (19.9 ft·lb) |
| Closest other-system size | ~3/8 inch |
🔧 Torque unit converter
Pre-filled with the typical torque for M10 grub (45H, dry). Edit any field to convert.
⚠️ Torque values here are general references for 45H on clean, dry threads. Lubrication, coatings, and the joint material change the figure significantly. For structural, automotive, or safety-critical work, always use the torque specified by the manufacturer or engineer.
About M10 grub
M10 grub screws lock large couplings and heavy machine parts.
For high vibration, pair an M10 grub with a jam nut or thread locker.
Frequently asked questions
- What size Allen / hex key fits M10 grub?
- M10 set screw uses a 5 mm hex (Allen) key with an internal hex drive.
- What is the torque for M10 grub?
- A typical tightening torque for M10 set screw in 45H on dry threads is about 27 Nm (19.9 ft·lb). Always confirm against the manufacturer spec for important joints.
- What thread pitch and tap drill does M10 grub use?
- M10 set screw has a thread pitch of 1.5 mm and uses a 8.5 mm tap drill, with a n/a (threaded) clearance hole.