7/16-14 UNC Thread Specifications
Complete dimensions for 7/16-14 UNC (Unified National Coarse) thread per ASME B1.1. TPI: 14, Pitch: 0.07143" (1.814 mm).
Thread Dimensions
| Designation | 7/16-14 UNC |
| Threads Per Inch (TPI) | 14 |
| Pitch | 0.07143" (1.814 mm) |
| Major Diameter | 0.4375" (11.112 mm) |
| Pitch Diameter | 0.3911" (9.934 mm) |
| Minor Diameter (External) | 0.3499" (8.887 mm) |
| Minor Diameter (Internal) | 0.3602" (9.149 mm) |
| Thread Depth | 0.03866" (0.982 mm) |
| Tensile Stress Area | 0.10631 in² (68.6 mm²) |
Tap Drill Size
Recommended tap drill: 23/64" (0.3594" / 9.13 mm)
Calculated minor diameter (internal): 0.3602" (9.15 mm)
Proof Loads by SAE Grade
| Grade | Proof Stress (psi) | Tensile Strength (psi) | Proof Load (lbf) | Tensile Load (lbf) |
|---|---|---|---|---|
| Grade 2 | 55,000 | 74,000 | 5,847 | 7,867 |
| Grade 5 | 85,000 | 120,000 | 9,036 | 12,757 |
| Grade 8 | 120,000 | 150,000 | 12,757 | 15,946 |
Same Size, Different Series
Common Applications
- Automotive, heavy-duty brackets, machinery
- Coarse thread applications