Plain washers are used to provide a larger bearing surface where screws, bolts and nuts come in contact with the bearing surfaces.
316 washer is useful where the product is exposed to water or sea water.
Shims refer to a broad class of specialty flat washers that are used for positioning and spacing. While shims look like flat washers they are different in that shims are typically made using more precise materials and production techniques.
Small outer Dia washer
SS Washers complying to DIN 125 standards
Large Outer Diameter washer
Plain Washers SS