Thread (stripping) shear strength
Shear (stripping) strength of a metric thread engagement, from the effective thread length and allowable shear stress.
Thread shear strength, F = τ·Aₜₕ11.59 kN
Tensile stress in bolt cross-section, σ = F/Aₜ316.49 MPa
Diameter, d₀ = (d₂+d₃)/26.8 mm
Tensile stress area, Aₜ36.61 mm²
Shear area, Aₜₕ42.91 mm²
Method & references
- Thread stripping shear strength for a metric thread engagement.
The computation is a literal port of the original client-side JavaScript from /calculators/e3_6f.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.