MS24665-208 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 exposed to vibration and operational loads. This package contains 100 cadmium-plated cotter pins intended for aviation maintenance, repair, and production applications.

Manufactured in accordance with the MS24665 specification, this cotter pin features a nominal 5/64 in. diameter and 1/2 in. overall length. The cadmium-plated steel construction provides excellent corrosion protection while maintaining the strength and ductility required for secure installation in aircraft assemblies. The protective finish also enhances durability in demanding aerospace operating environments.

During installation, the cotter pin is inserted through a pre-drilled hole in a bolt, clevis pin, or castellated nut and the legs are bent in opposite directions to prevent fastener rotation or accidental removal. This simple but highly effective locking method is widely used throughout airframe, landing gear, engine, flight control, and hydraulic system assemblies where dependable mechanical retention is essential for safe aircraft operation.

As with standard aviation maintenance practices, cotter pins should be replaced whenever removed to maintain proper locking performance and ensure continued reliability of the secured assembly.

Key Features

- Part Number: MS24665-208
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Cotter Pin (Split Pin)
- Material: Cadmium-plated steel
- Nominal Size: 5/64 in. diameter × 1/2 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