M10×0.75 Thread Specifications
Complete dimensions for M10×0.75 fine pitch thread per ISO 724. Pitch: 0.75mm (33.9 TPI equivalent).
Thread Dimensions
| Designation | M10×0.75 |
| Thread Series | ISO Metric Fine |
| Pitch | 0.75 mm (33.9 TPI) |
| Major Diameter (d) | 10 mm (0.3937") |
| Pitch Diameter (d₂) | 9.5129 mm (0.3745") |
| Minor Diameter — External (d₁) | 9.0798 mm (0.3575") |
| Minor Diameter — Internal (D₁) | 9.1881 mm (0.3617") |
| Thread Depth | 0.4059 mm |
| Tensile Stress Area | 67.09 mm² |
| Fundamental Triangle Height (H) | 0.6495 mm |
Tap Drill Size
Recommended tap drill: 9.0 mm
Calculated minor diameter (D₁): 9.19 mm. Closest standard metric drill: 9.0 mm.
Closest inch drill: 23/64" (0.3594" / 9.13 mm)
Proof Loads by Property Class
| Class | Proof Stress (MPa) | Tensile Strength (MPa) | Proof Load (kN) | Tensile Load (kN) |
|---|---|---|---|---|
| 4.6 | 225 | 400 | 15.1 | 26.8 |
| 4.8 | 310 | 420 | 20.8 | 28.2 |
| 5.8 | 380 | 520 | 25.5 | 34.9 |
| 8.8 | 580 | 800 | 38.9 | 53.7 |
| 9.8 | 650 | 900 | 43.6 | 60.4 |
| 10.9 | 830 | 1040 | 55.7 | 69.8 |
| 12.9 | 970 | 1220 | 65.1 | 81.8 |
Proof load = stress area × proof stress. Per ISO 898-1.
Related Thread Sizes
Common Applications
- Automotive engine components
- Precision machinery
- Vibration-prone joints
- Cylinder head bolts
How M10×0.75 Dimensions Are Calculated
All dimensions on this page are calculated from ISO 724 formulas using the nominal diameter (10 mm) and pitch (0.75 mm):
- Fundamental triangle height: H = (√3/2) × P = 0.6495 mm
- Pitch diameter: d₂ = d − 0.6495 × P = 9.5129 mm
- Minor diameter (external): d₁ = d − 1.2269 × P = 9.0798 mm
- Minor diameter (internal): D₁ = d − 1.0825 × P = 9.1881 mm
- Thread depth: 5H/8 = 0.4059 mm
- Tensile stress area: Aₛ = (π/4) × ((d₂ + d₃)/2)² = 67.09 mm²