J.Lanfranco dual-slotted locknuts are based on depitched rather than distorted or deformed threads. As a result, they provide highly-consistent, repeatable, and reliable self-locking torque that’s independent of bolt tension.

Our locknuts preserve surface treatments, won’t damage bolt threads, and will never seize up – even in stainless steel.

  • Bolt threads expand locking slots located in the turret section of the nut.
  • Locking slots grip the thread flanks directly where they are designed to support the applied load.
  • Locking torque is applied evenly over two planes, and on opposite sides.
  • Once engaged, locking will be effective even with no bolt tension (ideal where low preload is desired).
  • No galling or thread damage, and resists vibration, shock, and impact.

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