Self-Locking Fasteners

Lockwireless technology on fasteners



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JPB Système has designed a Lockwireless Technology which is the most reusable, reliable and cost effective secondary locking feature available for structural fasteners.

At JPB Système we offer a creative and effective lockwireless solution to the current assembly issues.

Advantages of our Lockwireless technology for fasteners



Eliminate the need of safety wire

JPB Système's parts do not need safety wire thereby eliminating FOD, reducing maintenance costs and installation time and the possibility of injury due to a sharp wire end after cutting.

HEX Sizes - Standard tooling

Our products has standard HEX sizes and utilizes a standard wrench to be mounted on tubing.
BI-HEX is available on request.

Self locking prevailing torque

Our Lockwireless technology generates a self locking torque during the installation and removal process of fasteners on application. This torque ensures the maintaining of nut on assembly during all operating time.

Standard dimensions

JPB Système has designed their product in order to have the same overall dimensios as standard nut and is adaptable to standard hardward (i.e.: Screw MS2150).

Applications



JPB Système has already designed several nuts for assembly applications as :

  • Fan Brake of Plane Undercarriage
  • Main Wheel assembly of Plane Undercarriage
  • Axial clamping Rolling element bearing

Self Locking System Qualification



Our self locking fasteners devices comply with the standard specifications NASM25027 and NAS3350.

  • Stress Embrittlement test
  • Stress Corrosion
  • High Temp cycle endurance - @ 250°F (121°C), 450°F (232°C) and 800°F (426°C)
  • Locking torque test
  • Breakaway torque test
  • Vibration test
  • Junker Test - per DIN 25201-4

Junker test for Self Locking Fasteners



The most critical vibration test

A Junker test is a mechanical test to determine the point at which a bolted joint loses its preload when subject to shear loading caused by transverse vibration.


  • Our Design engineers apply the Junker Test to check if the fasteners securing - such as lock nuts, wedges and lock washers - pass and succeed the vibration test.
  • The data collected by the bench test enable design engineers to specify fasteners that will perform under a wide range of conditions without loosening.