Page 311 - Mechanical Engineer's Data Handbook

GENERAL DATA 299

8.2.4 IS0 metric nut arad bolt sizes

IS0 metric precision hexagon nuts and bolts (all quantities) (in mm)

M1.6 0.35 3.2 3.7 1.225 9.2 1.3 - 0.35 0.795 1.25
M2 0.4 4 4.6 1.525 10 1.6 - 0.4 1.53 1.6
M2.5 0.45 5 5.8 1.825 11 2 - 0.45 2.61 2.05
M3 0.5 5.5 6.4 2.125 12 2.4 - 0.5 4.0 2.5
M4 0.7 7 8.1 2.925 14 3.2 - 0.7 6.82 3.3
M5 0.8 8 9.2 3.65 16 4 - 0.8 11.3 4.2
M6 1 10 11.5 4.15 18 5 - 1 15.8 5
M8 1.25 13 15 5.65 22 6.5 5.0 1.25 30.0 6.8
M10 1.5 17 19.6 7.18 26 8 6.0 1.5 48 8.5
M12 1.75 19 21.9 8.18 30 10 7.0 1.75 70.5 10.2
M16 2 24 27.7 10.18 38 13 8.0 2 136 14
M20 2.5 30 34.6 13.215 46 16 9.0 2.5 212 17.5
M24 3 36 41.6 15.215 54 19 10.0 3 305 21
M30 3.5 46 53.1 19.26 66 24 12.0 3.5 492 26.5
M36 4 55 63.5 23.26 18 29 14.0 4 722 32
M42 4.5 65 75.1 26.26 90 34 16.0 4.5 1007 37.5
M48 5 75 86.6 30.26 102 38 18.0 5 1330 43
M56 5.5 85 98.1 35.31 118 46 - 5.5 1830 50.5
M64 6 95 109.7 40.31 134 51 - 6 2430 58
D =nominal diameter Lmin =minimum length of thread
pr =pitch (fine series) t, =thickness of normal nut
pE =pitch (coarse series) t, = thickness of thin nut
f= width across flats Ab=area at bottom of thread
c = width across corners D, = tapping drill diameter for coarse thread
h=height of head L = bolt length

Standard bolt lengths (L)
4
20,25,30,35,40,45,50,55,60,65,70,75,80,90,
100,
110, 120, 130, 140, 150
Standard screw lengths
10, 12, 16, 18, 20,22, 25, 30, 35,40,45, 50, 55,60, 70.