EngiRef / UNC Bolt Specification
7/16-14
7/16-14 coarse UNC bolt: 14 threads per inch, 11.11 mm major diameter. Tensile stress area 68.6 mm² per ASME B1.1. Takes a 16.67 mm wrench.
Specification
- Size
- 7/16-14
- Threads per inch (TPI)
- 14
- Major diameter D (mm)
- 11.11
- Minor diameter D₁ (mm, internal thread)
- 9.14
- Tensile stress area (mm²)
- 68.6
- Wrench size (mm)
- 16.67
Tensile stress area follows ASME B1.1, At = 0.7854(D − 0.9743/n)² in², converted at 645.16 mm²/in². Verify against the current standard and the fastener manufacturer's data before safety-critical design.