M52×5.0 Thread Specifications
Complete dimensions for M52×5.0 coarse pitch thread per ISO 724. Pitch: 5.0mm (5.1 TPI equivalent).
Thread Dimensions
| Designation | M52×5.0 |
| Thread Series | ISO Metric Coarse |
| Pitch | 5.0 mm (5.1 TPI) |
| Major Diameter (d) | 52 mm (2.0472") |
| Pitch Diameter (d₂) | 48.7525 mm (1.9194") |
| Minor Diameter — External (d₁) | 45.8655 mm (1.8057") |
| Minor Diameter — Internal (D₁) | 46.5875 mm (1.8342") |
| Thread Depth | 2.7063 mm |
| Tensile Stress Area | 1757.83 mm² |
| Fundamental Triangle Height (H) | 4.3301 mm |
Tap Drill Size
Recommended tap drill: 46.0 mm
Calculated minor diameter (D₁): 46.59 mm. Closest standard metric drill: 46.0 mm.
Closest inch drill: 1-53/64" (1.8281" / 46.43 mm)
Proof Loads by Property Class
| Class | Proof Stress (MPa) | Tensile Strength (MPa) | Proof Load (kN) | Tensile Load (kN) |
|---|---|---|---|---|
| 4.6 | 225 | 400 | 395.5 | 703.1 |
| 4.8 | 310 | 420 | 544.9 | 738.3 |
| 5.8 | 380 | 520 | 668.0 | 914.1 |
| 8.8 | 580 | 800 | 1019.5 | 1406.3 |
| 9.8 | 650 | 900 | 1142.6 | 1582.0 |
| 10.9 | 830 | 1040 | 1459.0 | 1828.1 |
| 12.9 | 970 | 1220 | 1705.1 | 2144.6 |
Proof load = stress area × proof stress. Per ISO 898-1.
Common Applications
- Structural steel
- Bridge construction
- Heavy industrial equipment
- Foundation bolts
How M52×5.0 Dimensions Are Calculated
All dimensions on this page are calculated from ISO 724 formulas using the nominal diameter (52 mm) and pitch (5.0 mm):
- Fundamental triangle height: H = (√3/2) × P = 4.3301 mm
- Pitch diameter: d₂ = d − 0.6495 × P = 48.7525 mm
- Minor diameter (external): d₁ = d − 1.2269 × P = 45.8655 mm
- Minor diameter (internal): D₁ = d − 1.0825 × P = 46.5875 mm
- Thread depth: 5H/8 = 2.7063 mm
- Tensile stress area: Aₛ = (π/4) × ((d₂ + d₃)/2)² = 1757.83 mm²