The 494-283 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 provide even load distribution under bolted or screwed joints, ensuring proper clamping force and protecting mating surfaces from damage.

In Piper aircraft systems, washers such as the 494-283 are commonly used in airframe structures, control system linkages, landing gear assemblies, and equipment mounting points, depending on aircraft model configuration. Its primary function is to reduce localized stress concentration, minimize wear between components, and support consistent fastener performance under vibration and cyclic loading.

Manufactured to Piper OEM standards, this washer is typically made from corrosion-resistant aircraft-grade steel or alloy material, providing durability and long service life in aviation environments exposed to moisture, temperature variation, and continuous mechanical stress.

Although small, it is a critical part of the fastener stack-up, helping maintain correct torque values and joint integrity. Using the correct specification washer is essential for maintaining airworthiness and ensuring reliable assembly performance.

Key features include:

Piper 494-283 aircraft washer (OEM hardware component)
Provides uniform load distribution in bolted joints
Prevents surface damage and reduces stress concentration
Used in airframe, control, 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 structural integrity and maintenance compliance