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About This Item


Full Description

This specification defines the requirements of the Crimplock fastening system consisting of crimp nuts and flush or protruding head crimp pins. The installed Crimplock fastening system provides for an assembly with uniform clamping force and a mechanically locked nut to a pin. The installed components result in a permanently installed fatigue-rated fastener for aerospace structures.

Document History

  1. NAS 4444 Rev. 5


    Crimplock Fastener System

    • Most Recent
  2. NAS 4444

    Crimplock Fastener System

    • Historical Version