Brass Finish (Countersunk) Cup Washer

Brass Finish (Countersunk) Cup Washer

BRASS Countersunk Finish (Cup) Washer | The Nutty Company, Inc.
Decorative Solid BRASS Finishing Washer
(also know as a Cup Washer) 
They are often used under the head of a Countersunk (Flat)
Head Screw for a finished look.
!