The NAS1197-416 is an aerospace-standard flat washer used in aircraft structural and mechanical assemblies to distribute load and protect mating surfaces under fastener heads or nuts. It helps reduce surface damage, improve load distribution, and maintain consistent clamping force in bolted joints.

This washer is commonly used in airframe structures, brackets, equipment mounting, and general aviation hardware installations where vibration resistance and long-term joint integrity are required. It is designed to work with compatible NAS/AN/MS bolts and screws.

Manufactured to NAS specifications, the washer is typically made from corrosion-resistant steel (often cadmium-plated) to ensure durability in harsh aviation environments exposed to vibration, moisture, and temperature variations.

Key features include:

NAS1197-416 aerospace flat washer
100 pcs maintenance pack
Used for load distribution in bolted joints
Protects surfaces from damage and wear
Compatible with NAS/AN/MS fasteners
Corrosion-resistant steel construction
Cadmium-plated aviation finish
Used in airframe and mechanical assemblies
Suitable for vibration and cyclic load environments
Direct replacement per NAS aircraft hardware standards