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M12 hex flange bolt size
18 mm wrench
wrench size for M12 flange bolt
M12 flange bolt — Heavy machinery, automotive, structural.
Full specification
| System | Metric coarse |
| Nominal diameter | 12 mm |
| Thread pitch | 1.75 mm |
| Wrench size | 18 mm |
| Tap drill | 10.2 mm |
| Clearance hole | 13.5 mm |
| Common grade / class | 8.8 |
| Typical torque | 85 Nm (62.7 ft·lb) |
About M12 flange bolts
Heavy machinery, automotive, structural.
Hex flange bolts have an integrated washer face under the head, which distributes load over a wider area. This eliminates the need for a separate washer and provides better resistance to vibration loosening.
Commonly used in automotive applications, sheet metal work, and machinery where vibration resistance is important.
Frequently asked questions
- What size wrench fits M12 flange bolt?
- M12 flange bolt uses a 18 mm wrench.
- What is the torque for M12 flange bolt?
- Typical torque for M12 flange bolt in 8.8 is about 85 Nm (62.7 ft·lb).
- What are flange bolts used for?
- M12 flange bolts are used in heavy machinery, automotive, structural.