Knowledge Base › Thread Standards Library (BSPP, BSPT, NPT, Metric, UNC)
THREAD STANDARDS LIBRARY
📐 Flank Angle & Pitch Specifications

Thread Standards Library (BSPP, BSPT, NPT, Metric, UNC)

Technical thread library covering Whitworth BSPP/BSPT, American NPT/NPTF, ISO Metric (M), and Unified UNC/UNF pitch, flank angles, and tap drill sizes.

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1. Thread Pitch & Flank Angle Matrix

Thread TypeFlank AngleTaper RatioSealing Method
BSPP (G)55° WhitworthParallel (0°)O-Ring / Bonded Washer
NPT60° Sellers1:16 TaperPTFE Sealant Tape

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