About Lokserts

Loksert Solid Key-Locking Inserts are used to repair damaged or worn out threads and to create new threads in original equipment manufacture.

The locking keys on each Loksert Key-Locking Insert provide a positive mechanical lock into the threads of the surrounding base material. The resulting thread is highly resistant to rotation arising from external vibration and torsion.

Features & Benefits

  • Solid, one-piece insert provides a high degree of pull-out strength
  • Locking keys provide a positive mechanical lock, preventing rotation
  • Simple installation and removal
  • Can be installed using standard drills and taps
  • No prewinder or expensive installation tools required
  • No tang to break off
  • Suitable for use in a wide variety of materials
  • Also available in MS/NAS Standards

Thread Types

  • Metric Coarse & Metric Fine
  • Unified National Coarse (UNC) & Unified National Fine (UNF)


  • Carbon Steel
  • Stainless Steel


  • Miniature
  • Thinwall
  • Heavy Duty
  • Extra Heavy Duty