EngiRef / UNC Bolt Specification
3/4-10
3/4-10 coarse UNC bolt: 10 threads per inch, 19.05 mm major diameter. Tensile stress area 216 mm² per ASME B1.1. Takes a 28.58 mm wrench. Free imperial…
Specification
- Size
- 3/4-10
- Threads per inch (TPI)
- 10
- Major diameter D (mm)
- 19.05
- Minor diameter D₁ (mm, internal thread)
- 16.31
- Tensile stress area (mm²)
- 216
- Wrench size (mm)
- 28.58
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.