Din 439 Lock Nuts are standard nuts with a reduced height in comparison to the hexagon full nut. Also known as ‘lock’ nuts, they are commonly used with any male fastener with the same thread diameter and pitch, used to mate a stack or single part together.

TECHNICAL SPECIFICATIONS
Material Brass, Steel or Stainless Steel, Brass CZ 121
Thread Coarse
Type Hex Nut
Size 4/6”
Grade Free Cutting Brass, CDA 360 Brass, C360 Brass
Din 439 Lock Nut • BS 3692
• BS 57
• IS/1363
• IS/1367
d1 s e m
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

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