EngiRef / Metric Bolt Specification
M5
M5 coarse-thread metric bolt: 0.8 mm pitch, 5 mm major diameter. Tensile stress area 14.2 mm² per ISO 898-1. Takes a 8 mm wrench. Free bolt specification table…
Specification
- Size
- M5
- Pitch (mm)
- 0.8
- Major diameter d (mm)
- 5
- Minor diameter d₃ (mm, external thread)
- 4.02
- Tensile stress area (mm²)
- 14.2
- Head height (mm)
- 3.5
- Head diameter (mm)
- 8.5
- Wrench size (mm)
- 8
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.