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H = (√3/2) × P — Fundamental triangle height

d₂ = d − 0.6495 × P — Pitch diameter

d₁ = d − 1.2269 × P — Minor diameter (external)

D₁ = d − 1.0825 × P — Minor diameter (internal / tap drill)

Aₛ = (π/4) × ((d₂ + d₃)/2)² — Tensile stress area, where d₃ = d₁ − H/6