The EC1080-017-08SS is a stainless steel Tinnerman-style countersunk finishing washer used in aircraft sheet metal and interior/exterior fairing installations. It is designed to work with #8 countersunk screws, providing a low-profile, load-distributing surface that helps prevent fastener pull-through and protects thin aluminum or composite skins.

This washer is an aerospace “dimpled” style fastener accessory commonly used in aircraft assembly where a flush or near-flush finish is required.

Its primary features include:
Stainless steel Tinnerman-style aviation washer
Designed for #8 countersunk screws (100° head)
Low-profile design for flush surface installation
Helps distribute load on thin sheet metal and fairings
Prevents pull-through and surface deformation
Corrosion-resistant construction for aviation environments
Commonly used in aircraft interior and exterior trim assemblies
FAA-standard aviation hardware category (MS/AN equivalent family)

This part is typically cross-referenced with DP1080-17SS, a common alternate part number used in aviation hardware catalogs for the same countersunk finishing washer style.