Thread Dimensions Calculator

Calculate printable thread dimensions with proper clearance for common metric and imperial thread sizes.

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How It Works

Metric thread geometry: H = P x sqrt(3)/2. The minor diameter = major - 1.25 x H. For 3D printing, add clearance (0.2-0.4mm) between mating surfaces. Minimum printable pitch is roughly 2x nozzle diameter. Threads below M8/1.25 pitch are difficult with a 0.4mm nozzle.