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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.

Following are the specification for DIN 439 Lock Nuts 

  • Wrench Size:  4/6”
  • Thread:  Coarse
  • Type:  Hex Nut
  • Grade:  Free Cutting Brass, CDA 360 Brass, C360 Brass
  • Material:  Brass, Steel or Stainless Steel, Brass CZ 121
Din 439 Lock Nuts graph

Standard Followed for DIN 439 Lock Nuts

  • BS 3692
  • BS 57
  • IS/ 1363
  • IS/ 1367

All measurements are in millimeters (mm)

d1sem
M244.321.2
M35.56.011.8
M477.662.2
M588.792.7
M61011.053.2
M81314.384
M101718.95
M121921.16
M142224.497
M162426.758
M182729.569
M203032.9510
M223235.0311
M243639.5512
M274145.213.5
M304650.8515
M335055.3716.5
M365560.7918