The 402-974 is a Piper OEM aircraft bolt used as a primary structural fastening component in various airframe and mechanical assemblies. It is designed to clamp components together securely while maintaining high strength and reliability under vibration, cyclic loading, and operational stresses.

In Piper aircraft applications, bolts like the 402-974 are commonly used in airframe structures, landing gear assemblies, flight control systems, engine mounts, and equipment attachment points, depending on aircraft model configuration. Its primary function is to provide a high-strength mechanical connection that maintains correct alignment and load transfer between components.

This bolt is typically installed with matching nuts, washers, and, where required, safety devices such as cotter pins or locking features to prevent loosening during operation. Proper torque application is critical to ensure structural integrity and safe performance.

Manufactured to Piper OEM specifications, the 402-974 is generally made from high-strength aircraft-grade steel or alloy steel, often with corrosion-resistant coatings such as cadmium or zinc plating to protect against environmental exposure and corrosion in aviation service conditions.

Because it is used in structural and potentially flight-critical assemblies, correct installation, torqueing, and inspection are essential for maintaining airworthiness and long-term reliability.

Key features include:

Piper 402-974 aircraft bolt (OEM fastener component)
Provides high-strength structural fastening
Used in airframe, landing gear, and control system assemblies
Ensures secure clamping and load transfer between components
Material: aircraft-grade steel or alloy steel
Corrosion-resistant protective coating (application dependent)
Designed for vibration and cyclic load environments
Compatible with locking nuts, washers, and safety devices
Critical for structural integrity and flight safety
Direct replacement part per Piper IPC specifications