MS172321

Nut
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About this product
The MS172321 is an aerospace‑grade hexagnetic prevailing‑torque nut manufactured from cadmium‑plated steel. Engineered to resist vibration‑induced loosening, it features a deformed‑thread section that provides consistent locking force without the need for lockwire. Supplied with a full Manufacturer’s Certificate of Conformance, it meets stringent airworthiness traceability requirements.
MS172321 Datasheet
UOM: EA
Stock Location: Dubai
Hazardous Item: Non-Hazardous Item
Lead Time: Stock
Certification: MANF COFC
PRODUCT DESCRIPTION

MS172321

  • Prevailing‑Torque Locking: Deformed‑thread design maintains clamp load under high‑cycle vibration.

  • Cadmium‑Plated Steel: Protects against corrosion in moisture, hydraulic fluids, and cleaning solvents.

  • Lightweight Design: Optimized geometry reduces weight while maintaining full load capacity.

  • Standard MS17232 Series: Interchangeable with common jam‑nut assemblies for retrofit.


  • Secures jam‑nut on AN bolts in primary wing spar splice fittings under flight loads.

  • Locks clevis‑pin nuts in aileron and elevator hinge assemblies subjected to turbulence.

  • Retains forward‑mount bolts on engine‑to‑pylon brackets during ground run‑ups.

  • Clamps actuator and link‑pin studs in retract/extend mechanisms under cyclical stress.


  • How does the prevailing‑torque feature work?

The deformed thread section exerts radial pressure on the mating bolt, creating friction that resists loosening under vibration.

  • How do I inspect the nut before installation?

Verify thread deformation is uniform, plating is intact, and threads are free of debris or damage.

  • What environmental conditions can it withstand?

Rated for exposure to salt‑spray, humidity, hydraulic fluids, and cleaning solvents per RTCA/DO‑160 standards.


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