Din 439 is the standard for thin Hexagon nuts with metric coarse and fine pitch thread. Often also called half nuts, lock nuts or jam nuts

Although in theory it has been replaced it is still very widely used

DIN 439 Specifications - Click Here To See Our Range

DIN 439 Half nut drawing

All measurements in millimeters (mm)

d1sem
M2 4 4.32 1.2
M3 5.5 6.01 1.8
M4 7 7.66 2.2
M5 8 8.79 2.7
M6 10 11.05 3.2
M8 13 14.38 4
M10 17 18.9 5
M12 19 21.1 6
M14 22 24.49 7
M16 24 26.75 8
M18 27 29.56 9
M20 30 32.95 10
M22 32 35.03 11
M24 36 39.55 12
M27 41 45.2 13.5
M30 46 50.85 15
M33 50 55.37 16.5
M36 55 60.79 18

All information is strictly informative

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