punching washer,CNC machined washer
Material: carton steel,stainless steel,brass
treatment: galvanization 
Washers are commonly used to distribute load in a threaded fastener joint, act as a spacer, reduce vibration, or act as a protective barrier. Our durable, high quality fastener washers are designed to fit under the head of a fastener to increase the hold or bearing surface.
Flat washers are designed to be placed under the head of bolt or nut for general use applications.Flat wahsers offer a smooth-bearing surface to distribute the fastener load over a wider surface area.
Flat washers evenly distribute pressure when a bolt or screw is tightened,increase surface area to prevent the loosening and  pullout of a fastener.Flat washers also relieve surface friction and can be sued as spacers when additional clearance between objects is necessary.
We can make standard and nonstadnard for you.