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Aerotight Lock Nut

Steel Class 8

Base DIN 980V

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Detail & Specs

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Class 8 Steel / AEROTIGHT Coarse Thread
*Sold Per Piece*

Aerotight all-metal lock nuts spin freely until the thread of the mating fastener reaches the horizontal locking slits on the collar of the nut. The interference expands against the mating threads and locks the assembly together. Able to be reused many times.

Full engagement: Tighten until mating screw is roughly 2 threads beyond the top locking portion of the nut.


  • Easy install and remove, Aerotight nuts can be reused many times
  • High temperature applications to 300 Degrees Celcius (no nylon insert)
  • Self Locking for Extreme vibration, shock and impact resistant
  • Does not need to be seated to lock / can be used as a "stop nut"

Class 8 metric lock nuts provide a medium strength, high tensile fastening solution. Commonly paired with Class 8.8 bolts and screws. Zinc Plated finish provides corrosion resistance without sacrificing strength.

Special Order Variations
Additional Sizes: M2.5, M3, M4, M5, M16

Also known as aero lock nut, split beam nut, prevailing torque split hex nut, slotted beam nut or stiff nut