316 Stainless Steel Flat Washer, Plain Finish, Meets DIN 9021, M18 Hole Size, 20mm ID, 56mm OD, 4mm Nominal Thickness NumberOfItems: 1 WasherSize: M18 InsideDiameterString: 20 mm OutsideDiameter: 56 mm ItemThicknessString: 4 mm Model: Misc.
The 316 stainless steel flat washer has a plain finish and meets Deutsches Institut fÆ’r Normung DIN 9021 specifications. The flat washer provides a bearing surface for fastener load distribution or is used as a spacer between components. The 316 stainless steel grade provides strength and offers better corrosion resistance than 18-8 stainless steel, especially in marine environments. The material may be slightly magnetic.
Washers distribute the load of a fastener across a surface and can also be used as spacers, springs, shims, or locking devices. Several different washer styles fit a variety of application and installation requirements. The most common style is a flat washer. More specialized washers provide additional benefits. A cup washer, for example, helps protect fasteners from electrical currents, while a lock washer offers additional security in an assembled workpiece.