#5-44 UNF Thread Specifications
Complete dimensions for #5-44 UNF (Unified National Fine) thread per ASME B1.1. TPI: 44, Pitch: 0.02273" (0.577 mm).
Thread Dimensions
| Designation | #5-44 UNF |
| Threads Per Inch (TPI) | 44 |
| Pitch | 0.02273" (0.577 mm) |
| Major Diameter | 0.125" (3.175 mm) |
| Pitch Diameter | 0.1102" (2.8 mm) |
| Minor Diameter (External) | 0.0971" (2.467 mm) |
| Minor Diameter (Internal) | 0.1004" (2.55 mm) |
| Thread Depth | 0.0123" (0.312 mm) |
| Tensile Stress Area | 0.00831 in² (5.4 mm²) |
Tap Drill Size
Recommended tap drill: #39 (0.0995" / 2.53 mm)
Calculated minor diameter (internal): 0.1004" (2.55 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 | 457 | 615 |
| Grade 5 | 85,000 | 120,000 | 706 | 997 |
| Grade 8 | 120,000 | 150,000 | 997 | 1,246 |
Same Size, Different Series
Common Applications
- Electronics
- Instrument screws
- Precision assemblies
- Avionics