280pcs Professional Assorted Copper Washer Gasket Set Flat Ring Seal Assortment Kit M5-M20 with Box For Hardware Accessories
- The washer is a thin disk-shaped plate with a hole in the middle that is normally used to distribute the load of a threaded fastener, such as a screw or nut.Other uses are as a spacer, wear pad, pre-load indicating device, locking device, and to reduce vibration.High-quality bolted joints require hardened steel washers to prevent the loss of pre-load after the torque is applied.Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminum surfaces.
