5/8-24 UNEF Thread Specifications
Complete dimensions for 5/8-24 UNEF (Unified National Extra Fine) thread per ASME B1.1. TPI: 24, Pitch: 0.04167" (1.058 mm).
Thread Dimensions
| Designation | 5/8-24 UNEF |
| Threads Per Inch (TPI) | 24 |
| Pitch | 0.04167" (1.058 mm) |
| Major Diameter | 0.625" (15.875 mm) |
| Pitch Diameter | 0.5979" (15.188 mm) |
| Minor Diameter (External) | 0.5739" (14.577 mm) |
| Minor Diameter (Internal) | 0.5799" (14.729 mm) |
| Thread Depth | 0.02255" (0.573 mm) |
| Tensile Stress Area | 0.26824 in² (173.1 mm²) |
Tap Drill Size
Recommended tap drill: 37/64" (0.5781" / 14.68 mm)
Calculated minor diameter (internal): 0.5799" (14.73 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 | 14,753 | 19,850 |
| Grade 5 | 85,000 | 120,000 | 22,800 | 32,189 |
| Grade 8 | 120,000 | 150,000 | 32,189 | 40,236 |
Same Size, Different Series
Common Applications
- Precision assemblies
- Thin-wall tubing
- Aerospace fittings