MS24665-142 Cotter Pin is a military standard aircraft fastening component designed to provide reliable secondary locking for castellated nuts, clevis pins, bolts, and other drilled fasteners used in critical aerospace assemblies. This cotter pin features a durable cadmium-plated steel construction, offering dependable mechanical retention and corrosion resistance for demanding aviation environments.

Manufactured in accordance with the MS24665 specification, this cotter pin has a nominal 1/16 in. diameter and 1-1/2 in. overall length. The cadmium-plated finish enhances protection against corrosion while preserving the strength and flexibility required for proper installation and long-term service. Its split-pin design provides a simple yet highly effective locking solution that helps prevent fasteners from loosening due to vibration, cyclic loading, and operational stresses.

After installation through the drilled hole of a compatible fastener, the legs are bent in opposite directions to create positive mechanical retention. MS24665 series cotter pins are commonly used in landing gear assemblies, flight control linkages, engine accessories, hydraulic systems, and numerous structural applications where secure fastener locking is essential for aircraft safety and reliability.

In accordance with accepted aircraft maintenance practices, cotter pins should be replaced whenever removed to ensure continued locking performance and maintain the integrity of the assembly.

Key Features

- Part Number: MS24665-142
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Cotter Pin (Split Pin)
- Material: Cadmium-plated steel
- Nominal Size: 1/16 in. diameter × 1-1/2 in. length
- Function: Secondary mechanical locking device for castellated nuts, clevis pins, and drilled fasteners
- Finish: Corrosion-resistant cadmium plating
- Suitable for aircraft structural, landing gear, engine, hydraulic, and flight control applications