MS24665-143 Cotter Pin is a military standard aircraft fastening component designed to provide positive mechanical locking for castellated nuts, clevis pins, bolts, and other drilled fasteners used throughout aircraft structures and mechanical systems. This package contains 100 cadmium-plated cotter pins suitable for aviation maintenance, repair, overhaul, and OEM assembly applications.

Manufactured to the MS24665 specification, this cotter pin features a nominal 1/16 in. diameter and 2 in. overall length. The steel construction with a durable cadmium-plated finish offers excellent corrosion resistance while maintaining the strength and ductility required for dependable installation and long-term service in demanding aerospace environments.

Once inserted through the drilled hole of a compatible fastener, the two legs are bent in opposite directions to prevent rotation or accidental removal. This proven locking method is widely used in landing gear assemblies, flight control systems, engine accessories, hydraulic equipment, and numerous airframe applications where vibration resistance and secure fastener retention are essential.

As with standard aircraft maintenance practices, cotter pins should be replaced whenever removed to ensure continued locking effectiveness and maintain the integrity of the secured assembly.

Key Features

- Part Number: MS24665-143
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Cotter Pin (Split Pin)
- Material: Cadmium-plated steel
- Nominal Size: 1/16 in. diameter × 2 in. length
- Function: Secondary mechanical locking device for castellated nuts, clevis pins, and drilled fasteners
- Finish: Corrosion-resistant cadmium plating
- Pack Quantity: 100 pieces
- Suitable for aircraft structural, landing gear, engine, hydraulic, and flight control applications requiring secure fastener retention