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M12×1.25 fine pitch bolt size
19 mm wrench
wrench size for M12×1.25 fine pitch bolt
M12×1.25 fine pitch bolt — Automotive, high-vibration applications.
Full specification
| System | Metric fine |
| Nominal diameter | 12 mm |
| Thread pitch (fine) | 1.25 mm |
| Wrench size | 19 mm |
| Tap drill | 10.75 mm |
| Clearance hole | 13.5 mm |
| Common grade / class | 10.9 |
| Typical torque | 85 Nm (62.7 ft·lb) |
🔧 Torque unit converter
Pre-filled with typical torque for M12×1.25 (10.9).
About M12×1.25 fine pitch bolts
Automotive, high-vibration applications.
Fine pitch threads (1.25 mm) have more threads per unit length than coarse threads. This provides:
- Better resistance to vibration loosening
- Finer adjustment capability
- Higher tensile stress area (stronger)
- More susceptible to galling and thread damage
Common applications include automotive engines, aerospace, and precision machinery where vibration resistance is critical.
Frequently asked questions
- What size wrench fits M12×1.25 bolt?
- M12×1.25 bolt uses a 19 mm wrench.
- What is the torque for M12×1.25 bolt?
- Typical torque for M12×1.25 bolt in 10.9 is about 85 Nm (62.7 ft·lb).
- What is the difference between fine and coarse thread?
- Fine thread (1.25 mm pitch) has more threads per unit length than coarse thread. Fine threads offer better vibration resistance and finer adjustment.