The S1028 Insulated Flat Washer is designed to provide electrical insulation between fasteners and conductive surfaces in aircraft and aerospace assemblies. It prevents electrical shorts and ensures proper isolation in sensitive electrical and avionics components.

Its primary functions include:

Providing electrical insulation between bolt/nut assemblies and conductive surfaces
Reducing the risk of short circuits in avionics and electrical systems
Maintaining mechanical stability while isolating electrical paths

This washer is commonly used in aircraft wiring installations, avionics panels, and other applications where maintaining electrical isolation is critical for system safety and performance.