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Long-Lok Fasteners Corp. T-Sert®


Aircraft Fasteners stocks the broadest range of self locking nuts in the industry.  One of our primary insert manufacturers include Long-Lok Fasteners Corp.

T-Sert® Self-Locking Inserts Provide…

  • Additional joint strength in low tensile materials such as aluminum, magnesium and
    plastics.
  • Self-locking internal threads.
  • Wear-resistant internal threads in soft materials.

    T-Sert® inserts require no locking rings or separate locking devices. An integral, self-locking element extends longitudinally through the wall of the insert, and provides simultaneous locking action for both internal and external threads in accordance with MIL-I-45932.

    The torque developed by the T-Sert® locking element provides approximately twice as much torque on the external as on the internal diameter, precluding the possibility of unintentional rotation after installation.


  • Process Type - Inserts. Provides self-locking internal thread.
  • Temperature Range - -320°F to +390°F, -196°C to + 199°C
  • Application Examples – Multi-use (soft materials, such as aluminum, magnesium and plastics), Aerospace (space flight data recorders)
  • Special Features – Additional joint strength, self-locking internal threads, and wear-resistant internal threads in soft materials.
  • Reusability - Complies with IFI 124 and MIL-DTL-18240
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Long-Lok TSert




We are authorized distributors for the premier manufacturers of these products.

SPS Technologies Acme Industrial Kato Fastening Systems Maclean Esna Alcoa Company Monodnock Company Nafco Industries Republic Fastener Mfg
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