These washers are very strong and for both indoor and outdoor use.
Save space. light and compact, stable.
Larger outside diameters are for applications that require significant pressure distribution, such as drywall, fencing, mounting fixtures, and sheet metal.
Washer is to increase the bearing surface area of the screw and reduce the surface pressure exerted on the fastened object.
Note: When using the countersunk washer, be sure to choose the appropriate size for your application. It is also important to ensure that the washer is properly seated between the screw head and the surface being fastened to prevent damage or failure.