M16×2.0 Thread Specifications
Complete dimensions for M16×2.0 coarse pitch thread per ISO 724. Pitch: 2.0mm (12.7 TPI equivalent).
Thread Dimensions
| Designation | M16×2.0 |
| Thread Series | ISO Metric Coarse |
| Pitch | 2.0 mm (12.7 TPI) |
| Major Diameter (d) | 16 mm (0.6299") |
| Pitch Diameter (d₂) | 14.701 mm (0.5788") |
| Minor Diameter — External (d₁) | 13.5462 mm (0.5333") |
| Minor Diameter — Internal (D₁) | 13.835 mm (0.5447") |
| Thread Depth | 1.0825 mm |
| Tensile Stress Area | 153.48 mm² |
| Fundamental Triangle Height (H) | 1.7321 mm |
Tap Drill Size
Recommended tap drill: 14.0 mm
Calculated minor diameter (D₁): 13.84 mm. Closest standard metric drill: 14.0 mm.
Closest inch drill: 35/64" (0.5469" / 13.89 mm)
Proof Loads by Property Class
| Class | Proof Stress (MPa) | Tensile Strength (MPa) | Proof Load (kN) | Tensile Load (kN) |
|---|---|---|---|---|
| 4.6 | 225 | 400 | 34.5 | 61.4 |
| 4.8 | 310 | 420 | 47.6 | 64.5 |
| 5.8 | 380 | 520 | 58.3 | 79.8 |
| 8.8 | 580 | 800 | 89.0 | 122.8 |
| 9.8 | 650 | 900 | 99.8 | 138.1 |
| 10.9 | 830 | 1040 | 127.4 | 159.6 |
| 12.9 | 970 | 1220 | 148.9 | 187.2 |
Proof load = stress area × proof stress. Per ISO 898-1.
Related Thread Sizes
Common Applications
- Heavy machinery
- Structural steel
- Automotive suspension
- Flange bolts
How M16×2.0 Dimensions Are Calculated
All dimensions on this page are calculated from ISO 724 formulas using the nominal diameter (16 mm) and pitch (2.0 mm):
- Fundamental triangle height: H = (√3/2) × P = 1.7321 mm
- Pitch diameter: d₂ = d − 0.6495 × P = 14.701 mm
- Minor diameter (external): d₁ = d − 1.2269 × P = 13.5462 mm
- Minor diameter (internal): D₁ = d − 1.0825 × P = 13.835 mm
- Thread depth: 5H/8 = 1.0825 mm
- Tensile stress area: Aₛ = (π/4) × ((d₂ + d₃)/2)² = 153.48 mm²