The 494-284 is a Piper OEM aircraft washer used in a variety of airframe and mechanical fastening applications. It is a precision hardware component designed to provide uniform load distribution in bolted assemblies, helping maintain correct clamping force and protecting mating surfaces from damage.

In Piper aircraft, washers like the 494-284 are commonly used across structural joints, control system linkages, equipment mounts, and landing gear-related assemblies, depending on aircraft model configuration. Its function is to reduce localized stress, prevent surface wear, and support stable fastener performance under vibration and cyclic loading conditions.

This washer is manufactured from corrosion-resistant aircraft-grade steel or alloy material, ensuring durability in aviation environments exposed to moisture, temperature variation, and long-term mechanical stress.

Although small and inexpensive, it plays an important role in maintaining the integrity of fastened joints. Correct washer selection is essential, as improper substitution can affect torque values, preload characteristics, and overall joint reliability.

Key features include:

Piper 494-284 aircraft washer (OEM hardware component)
Provides load distribution in structural 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