METRIC - Stud Bolt to Nut Chart

This metric stud bolt to nut table is meant to help determine the correct size bolt or nut for your purpose.  Definitions of terms are located below the chart.  Use the dimensions of your bolt to determine the appropriate size nut.  Have questions?  See definitions below.    COARSE Thread       FINE Thread NOM. PITCH DIAMETER PER  NUT NOM. PITCH DIAMETER PER  NUT DIA. mm mm inch inch Size DIA. mm mm inch inch Size M10 1.5 10 .03937 17 17 M16 1.5 16 .6299 17 24 M12 1.75 12 .04724 14-1/2 19 M18 2 18 .7087 12-3/4  27 M14 2 14 .5512  12-3/4 22 M18 1.5 18 .7087 17 27 M16 2 16 .6299 12-3/4 24 M20 2 20 .7874 12-3/4 30 M18 2.5 18 .7087 10-1/4 27 M20 1.5 20 .7874 17 30 M20 2.5 20 .7874 10-1/4 30 M22 2 22 .8661 12-3/4 32 M22 2.5 22 .8661 10-1/4 32 M22 1.5 22 .8661 17 32 M24 3 24 .9449 8-1/2  36 M24 2 24 .9499 12-3/4 36 M27 3 27 1.0630 8-1/2 41 M24 1.5 24 .9499 17 36 M30 3.5 30 1.1811 7-1/4 46 M27 2 27 1.0630 12-3/4 41 M33 3.5 33 1.2992 7-1/4 50 M27 1.5 27 1.0630 17 41 M36 4 36 1.4173 6-1/4 55 M30 2 30 1.1811 12-3/4 46 M39 4 39 1.5354 6-1/4 60 M30 1.5 30 1.1811 17 46 M42 4.5 42 1.6535 5-1/2 65 M33 2 33 1.2992 12-3/4 50 M45 4.5 45 1.7717 5-1/2 70 M33 1.5 33  1.2992 17 50 M48 5 48 1.8898 5-1/4 75 M36 3 36 1.4173 8-1/2 55 M52 5 52 2.0472  5-1/4 80 M36 1.5 36 1.4173 17 55 M56 5.5 56 2.2047 4-1/2 85 M39 3 39 1.5354 8-1/2 60 M60 5.5 60 2.3622 4-1/2 90 M42 3 42 1.6535 8-1/2 65 M64 6 64 2.5197  4-1/4 95 M45 3 45 1.7717 8-1/2 70 M68 6 68 2.6772 4-1/4 100 M48 3 48 1.8898 8-1/2 75 M72 6 72 2.8346 4-1/4 105 M52 3 52 2.0472 8-1/2 80 M76 6 76 2.9921 4-1/4 110 M56 4 56 2.2047 6-1/4 85 M80 6 80 3.1496 4-1/4 115 M60 4 60 2.3622 6-1/4 90 M85 6 85 3.3464 4-1/4 120 M64 4 64 2.5197  6-1/4 95 M90 6 90 3.5433  4-1/4 130 M68 4 68 2.6772 6-1/4 100 M100 6 100 3.9370 4-1/4 145 M72 4 72 2.8346 6-1/4 105 M110 6 110 4.3307 4-1/4 155 M76 4 76 2.9921 6-1/4  110 M125 6 125 4.9212 4-1/4 180 M80 4 80 3.1496 6-1/4 115 M140 6 140 5.5118 4-1/4 200 M85 4 85 3.3464 6-1/4 120 M160 6 160 6.2992  4-1/4 230 M90 4 90 3.5433 6-1/4 130 M100 4 100 3.9370  6-1/4 145 M110 4 110 4.3307 6-1/4 155 M125 4 125 4.9212 6-1/4 180 DEFINITIONS --NOMINAL DIAMETER (NOMINAL BOLT DIAMETER) The diameter equal to the external diameter of the threads or the overall diameter of the part.  (Nominal diameter is more of a label than a size. For example, a bolt and nut may be described as being ½” diameter. But neither the external threads of the bolt nor the internal threads of the nut are exactly .500 in diameter. In fact, the bolt diameter is a little smaller and the nut diameter a little larger. But it is easier to specify the components by a single size designation since the bolt and nut are mating components.) --PITCH (THREAD PITCH) Pitch is the distance from the crest of one thread to the next or the distance from one thread groove to the next, measured from crest to crest.  Pitch is also described as the number of threads per inch. --DIAMETER (BODY DIAMETER) The smallest or largest pitch diameter that fits onto a screw or into a nut, including all of the form deviations such as lead, thread angle, taper, and roundness. Functional diameter is a measure of the ability to assemble the thread. --THREAD (BOLT THREADS) A raised, helical rib or ridge around the interior or exterior of a cylindrically shaped object. Threads are found on screws, nuts, and bolts. --THREADS PER INCH The decimal equivalent of the number of threads in an inch. --COARSE THREADS & FINE THREADS Coarse threads are those with larger pitch (fewer threads per axial distance), and fine threads are those with smaller pitch (more threads per axial distance). Coarse threads have a larger threadform relative to screw diameter, whereas fine threads have a smaller threadform relative to screw diamete