NSA5454-12RH

NUT- LOCKING ASSY
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About this product
The NSA5454-12RH is a self-locking hex nut assembly specified under the Aérospatiale NSA5454 standard. This assembly incorporates a precision-threaded stainless-steel nut body and an integral locking element that maintains consistent clamp load in high-vibration aerospace applications. It serves as a critical fastener in structural and control-surface joints on a variety of transport-category aircraft.
NSA5454-12RH Datasheet
UOM: EA
Stock Location: Dubai
Hazardous Item: Non-Hazardous Item
Life Limited Part: No
Lead Time: Stock
Certification: EASA Form 1
8130/EASA Eligible: Yes
PRODUCT DESCRIPTION

NSA5454-12RH

  • Integral Locking Insert - A bi-metallic locking element exerts radial pressure on the threads, preventing self-loosening under cyclic loads and thermal cycling.

  • Precision UNJ Fine-Pitch Threads - Optimized thread geometry minimizes stress concentration and ensures uniform engagement torque for reliable joint integrity.

  • Corrosion-Resistant Finish - Cadmium-plating and chromate passivation protect against salt, moisture, and hydraulic-fluid exposure common in aircraft environments.

  • High Tensile Strength - Provides robust shear and clamp performance in primary structural attachments.


  • Securing shear-joint fasteners in wing-to-fuselage and empennage structural interfaces.

  • Capturing clevis pin retainers in landing-gear uplock and downlock mechanisms.

  • Fastening avionics-rack mounting hardware subject to vibration and thermal variation.

  • Replacement lock-nut assemblies during MRO of Boeing and Airbus narrow- and wide-body aircraft.


  • Can this nut assembly be reused after removal?

No, once torqued, the locking element deforms to match the fastener threads. Replace with a new unit to ensure proper locking performance.

  • How do I verify correct installation?

Install using a calibrated torque wrench, ensuring the locking element engages fully. Inspect post-installation for uniform thread engagement and absence of play.

  • Is there a life limit on this nut assembly?

No specific time-or-cycle life limit is assigned; however, inspect during scheduled maintenance for thread wear, corrosion, or reduced torque retention.


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