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M8 hex flange bolt size
13 mm wrench
wrench size for M8 flange bolt
M8 flange bolt — Automotive, machinery, sheet metal.
Full specification
| System | Metric coarse |
| Nominal diameter | 8 mm |
| Thread pitch | 1.25 mm |
| Wrench size | 13 mm |
| Tap drill | 6.8 mm |
| Clearance hole | 9 mm |
| Common grade / class | 8.8 |
| Typical torque | 25 Nm (18.4 ft·lb) |
About M8 flange bolts
Automotive, machinery, sheet metal.
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 M8 flange bolt?
- M8 flange bolt uses a 13 mm wrench.
- What is the torque for M8 flange bolt?
- Typical torque for M8 flange bolt in 8.8 is about 25 Nm (18.4 ft·lb).
- What are flange bolts used for?
- M8 flange bolts are used in automotive, machinery, sheet metal.