The 494-228 is a Piper OEM aircraft washer used in structural and mechanical fastening applications across various Piper aircraft assemblies. It is a precision hardware component designed to ensure even load distribution under fastener heads or nuts, helping maintain correct clamping force and protecting mating surfaces from damage.

In Piper aircraft systems, washers like the 494-228 are typically used in airframe structures, control system linkages, landing gear assemblies, and equipment mounting points, depending on aircraft model configuration. Its function is to reduce localized stress concentration, prevent fretting between components, and support stable fastener performance under vibration and cyclic loading.

Manufactured to Piper OEM standards, this washer is generally made from corrosion-resistant aircraft-grade steel or alloy material, ensuring durability and consistent performance in aviation environments exposed to moisture, temperature variation, and continuous mechanical stress.

Although small, it is an important part of the fastener stack-up, contributing to correct torque retention and overall joint integrity. Using the correct specification washer is essential for maintaining proper assembly performance and airworthiness compliance.

Key features include:

Piper 494-228 aircraft washer (OEM hardware component)
Provides uniform load distribution in bolted joints
Prevents surface damage and reduces stress concentration
Used in airframe, control system, and landing gear assemblies
Manufactured from corrosion-resistant aircraft-grade material
Designed for vibration and cyclic load environments
Maintains proper fastener preload and torque stability
Essential part of certified aircraft hardware stack-ups
Direct replacement part per Piper IPC specifications
Supports long-term structural integrity and maintenance compliance