For Screws and Nut Threads Limits of Sizes for Bolt & Nut Threads Reference No.: ISO 965/1-1980, ISO 965/2-1980 COARSE AND FINE THREAD SERIESTOLERANCE DESIGNATION BOLT THREADS6 h for sizes up to M 1, 4 6 g for sizes M 1, 6 and larger NUT THREADS5 H for sizes upto M 1, 4 6 H for sizes M 1, 6 and larger Note: Tolerances apply to the threads before coating. After coating the actual thread profile shall not exceed the maximum tolerance H or h limits. Thin (electroplate-type) coating may be acceptable. Thread Size in mm Engagement Length Major Diameter(d) Pitch Diameter(d2) from to max. Thread Size in mm Length of Thread engagement MAJOR DIAMETER PITCH DIAMETER over up to and incl. M8x1 3 9 7,974 7,794 7,324 7,212 M10x1.25 4 12 9,972 9,760 9,160 9,042 M12x1.25 4, 5 13 11,972 11,760 11,160 11,028 M14x1.5 5, 6 16 13,968 13,732 12,994 12,854 M16x1. Handbook Of Solid Phase Microextraction Pdf on this page. 5 5, 6 16 15,968 15,732 14,994 14,854 M18x1. Casio Hunting Timer Amw-701 Manual here. 5 5, 6 16 17,968 17,762 16,994 16,854 M20x1.5 5, 6 16 19,968 19,732 18,994 18,854 M22x1.5 5, 6 16 21,968 21,732 20,994 20,854 M24x2 8, 5 25 23,962 23,682 22,663 22,493 M27x2 8, 5 25 26,962 26,682 25,663 25,493 M30x2 8, 5 25 29,962 29,682 28,663 28,493 M33x2 8, 5 25 32,962 32,682 31,663 31,493 M36x3 12 36 35,952 35,577 34,003 33,803 M39x3 12 36 38,952 38,577 37,003 36,803.