9/16-24 UNEF Thread Specifications
Complete dimensions for 9/16-24 UNEF (Unified National Extra Fine) thread per ASME B1.1. TPI: 24, Pitch: 0.04167" (1.058 mm).
Thread Dimensions
| Designation | 9/16-24 UNEF |
| Threads Per Inch (TPI) | 24 |
| Pitch | 0.04167" (1.058 mm) |
| Major Diameter | 0.5625" (14.287 mm) |
| Pitch Diameter | 0.5354" (13.6 mm) |
| Minor Diameter (External) | 0.5114" (12.989 mm) |
| Minor Diameter (Internal) | 0.5174" (13.142 mm) |
| Thread Depth | 0.02255" (0.573 mm) |
| Tensile Stress Area | 0.21393 in² (138.0 mm²) |
Tap Drill Size
Recommended tap drill: 33/64" (0.5156" / 13.1 mm)
Calculated minor diameter (internal): 0.5174" (13.14 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 | 11,766 | 15,831 |
| Grade 5 | 85,000 | 120,000 | 18,184 | 25,672 |
| Grade 8 | 120,000 | 150,000 | 25,672 | 32,090 |
Same Size, Different Series
Common Applications
- Precision assemblies
- Thin-wall tubing
- Aerospace fittings