DIN 917   

*All measurements in millimeters (mm)*

d s e h r approx
M4 7 7.66 5.5 8
M5 8 8.79 7 10
M6 10 11.05 9 12
M8 13 14.38 12 15
M10 17 18.9 14 20
M12 19 21.1 16 25
M14 22 24.49 18 28
M16 24 26.75 20 30
M20 30 32.95 25 35
M24 36 39.55 30 40

All information is strictly informative