EngiRef / Metric Bolt Specification
M14
M14 coarse-thread metric bolt: 2 mm pitch, 14 mm major diameter. Tensile stress area 115 mm² per ISO 898-1. Takes a 22 mm wrench. Free bolt specification table…
Specification
- Size
- M14
- Pitch (mm)
- 2
- Major diameter d (mm)
- 14
- Minor diameter d₃ (mm, external thread)
- 11.55
- Tensile stress area (mm²)
- 115
- Head height (mm)
- 8.8
- Head diameter (mm)
- 21
- Wrench size (mm)
- 22
Tensile stress area follows ISO 898-1, At = (π/4)(d − 0.9382p)². Verify against the current standard and the fastener manufacturer's data before safety-critical design.