EngiRef / UNC Bolt Specification
#10-24
#10-24 coarse UNC bolt: 24 threads per inch, 4.83 mm major diameter. Tensile stress area 11.3 mm² per ASME B1.1. Takes a 9.53 mm wrench. Free imperial fastener…
Specification
- Size
- #10-24
- Threads per inch (TPI)
- 24
- Major diameter D (mm)
- 4.83
- Minor diameter D₁ (mm, internal thread)
- 3.51
- Tensile stress area (mm²)
- 11.3
- Wrench size (mm)
- 9.53
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.