Macro Photo Bolt Thread Pitch (mm vs TPI) & Flank Angle Identifier

Deterministic 1D spatial FFT crest-to-crest pitch estimator + sub-pixel Sobel flank-angle regression + ISO 261 / ASME B1.1 / BS 84 lookup engine (.jpg, .heic, .png, .pdf) built for McMaster-Carr, Misumi, Fastenal, Wera — zero-upload ephemeral Wasm RAM execution.

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