Metric Thread Pitch Chart & How to Measure Metric Bolt Lengths When selecting metric fasteners, understanding thread pitch and bolt length is essential to ensure compatibility and proper fitment. This guide explains the standard coarse thread pitches for common metric bolt sizes and how metric bolt lengths are measured. What is Thread Pitch? Thread pitch is the distance between adjacent threads, measured in millimetres (mm). For example, an M10 x 1.5 bolt has: M10 = 10mm nominal thread diameter 1.5 = 1.5mm distance between each thread The larger the pitch...
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