MS24665-134 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 throughout aircraft structures and mechanical systems. This 200-piece pack is intended for aviation maintenance, repair, overhaul, and OEM manufacturing where secure mechanical retention is essential.

Manufactured in accordance with the MS24665 specification, this cotter pin features a nominal 1/16 in. diameter and 3/4 in. overall length. It is commonly produced from corrosion-resistant stainless steel, offering excellent resistance to corrosion while maintaining the strength and flexibility required for dependable installation and long service life in demanding aerospace environments.

During installation, the cotter pin is inserted through the drilled hole of a compatible fastener and the legs are bent in opposite directions to create a positive mechanical lock. This simple and proven locking method helps prevent fasteners from loosening due to vibration, cyclic loading, and operational stresses. MS24665 cotter pins are widely used in landing gear assemblies, flight control systems, engine accessories, hydraulic equipment, and structural airframe applications where safety and reliability are critical.

In accordance with accepted 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: MS24665-134
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Cotter Pin (Split Pin)
- Material: Corrosion-resistant stainless steel
- Nominal Size: 1/16 in. diameter × 3/4 in. length
- Function: Secondary mechanical locking device for castellated nuts, clevis pins, and drilled fasteners
- Pack Quantity: 200 pieces
- Suitable for aircraft structural, landing gear, engine, hydraulic, and flight control applications requiring secure fastener retention