MS24665-134 – Bombardier OEM Aerospace Cotter Pin
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Overview
The MS24665-134 is a flight-critical, military-standard cotter pin used extensively throughout Bombardier's line of business and commercial jets. This component is engineered to provide an essential positive locking mechanism for castellated nuts on bolts, studs, and clevis pins, preventing catastrophic loosening due to the intense vibrations inherent in high-performance jet aircraft. Manufactured to the precise MS24665 specification from high-quality, corrosion-resistant steel, this cotter pin is a fundamental safety device required to maintain the airworthiness of primary and secondary structural joints.
Key Features
- Positive Mechanical Lock: Its primary function is to securely lock castellated nuts, providing a simple, inspectable, and foolproof method of ensuring critical fasteners do not back off during flight operations.
- High-Quality Carbon Steel: Fabricated from a specified carbon steel alloy that offers the ideal combination of shear strength to prevent failure and ductility to allow for proper installation without fracturing.
- Superior Corrosion Resistance: Plated with a durable cadmium finish in accordance with specification QQ-P-416, Type II, Class 3. This plating is essential for protecting the pin from corrosion in the demanding operational environment of high-altitude jet aircraft.
- MS Certified Standard: As a certified Military Standard component specified by Bombardier, it guarantees the material, dimensional tolerances, and quality control necessary for installation on type-certified aircraft. It is the direct superseding part for the legacy AN380-2-3 cotter pin.
- Extended Prong Design: Features the standard mil-spec design with one tine slightly longer than the other, which aids maintenance technicians in separating and bending the tines for a secure installation.
Technical Specifications
- Standard: MS24665 (Pin, Cotter, Split)
- Full Part Number: MS24665-134
- Legacy Part Number: AN380-2-3
- Material: Carbon Steel
- Finish: Cadmium Plated, Type II, Class 3
- Nominal Diameter: 1/16 inch (0.063 inches)
- Length: 3/4 inch (0.750 inches), measured from under the head loop.
- Point Type: Extended Prong, Square Cut
Aircraft Compatibility
The MS24665-134 is a standard hardware item used across the Bombardier aerospace platform, from the Challenger series to the Global Express. Its use is specified in any application requiring a 1/16" x 3/4" cotter pin to secure a castellated nut.
- Common Applications in Bombardier Aircraft:
- Landing Gear Systems: Securing nuts on linkages, actuators, and wheel axle assemblies.
- Flight Control Systems: Locking fasteners on actuator and hinge points for flaps, slats, ailerons, and elevators.
- Engine & Pylon Structures: Used on engine mounting hardware and pylon attachment points.
- Systems Installation: Securing various hydraulic, pneumatic, and electrical components throughout the airframe.
Applications
The MS24665-134 is indispensable for ensuring the safety and integrity of bolted joints:
- Securing Castellated Nuts: Installed through a drilled bolt shank to prevent the rotation of a castellated nut (e.g., AN310, AN320).
- Vibration-Proofing: Provides a vital safeguard against fastener loosening in the high-vibration environment of turbine-powered aircraft.
- Maintenance & Inspection: Offers a clear visual confirmation during maintenance checks that a critical fastener remains properly torqued and secured.
Why Choose MS24665-134?
In high-performance jet aircraft, the failure of a single critical fastener can have severe consequences. The MS24665-134 cotter pin is a simple, yet profoundly important, safety device. Using a genuine, traceable MS-standard cotter pin as specified by Bombardier ensures the part has the certified material strength and corrosion resistance to perform its function reliably for its entire service life. The use of non-certified hardware of unknown origin is an unacceptable risk in any aviation application, especially on transport-category aircraft.
Order Your MS24665-134 Cotter Pins Now
Ensure the airworthiness of your aircraft with certified, flight-critical hardware. Visit Airparts.aero to order your MS24665-134 cotter pins specified for Bombardier and other high-performance aircraft today.
The MS24665-134 cotter pin is a crucial element in achieving a "fail-safe" bolted joint. The primary fastening is provided by the torque and resulting preload on the bolt and nut. The cotter pin serves as the secondary locking device, ensuring that even if unforeseen forces or harmonic vibrations were to overcome the preload, the nut cannot back off more than a few degrees of rotation. This redundancy is a foundational principle of aerospace design. Proper installation technique, as outlined in Bombardier's maintenance manuals and standard practices like AC 43.13-1B, is essential. The tines must be bent to secure the pin without damaging the nut or bolt, and critically, the pin must never be reused.
Note: Cotter pins are strictly single-use items. A pin that has been installed and bent must never be straightened and reused, as the bending process work-hardens the metal and creates stress risers that can lead to fracture. Always use a new pin for every installation and verify the correct size from the applicable maintenance manual.
