200pcs Copper Washer Ring Metric Washer Gasket Kit Assortment 9 Sizes M5-M14 with Box Oil Pan Plug Sealing Tool Accessories

The washer is used when the hole has a larger diameter than the fastening nut. There are many different sizes of washers that you can use for different purposes. Purpose: The washer is a thin disc-shaped plate with a hole in the center, usually used to distribute the load of a threaded fastener such as a bolt or nut. Other uses include as a spacer, wear pad, preload indicator, locking device, and to reduce vibration. High-quality threaded connections require hardened steel washers to prevent loss of preload after torque is applied. Washers are also important for preventing galvanic corrosion, especially insulating steel bolts from aluminum surfaces. Uses: Widely used in flange and chemical connections Factory, Power plant, nuclear power plant and consumer electronics products, Hardware, precision instruments, electrical equipment, bearings, air pumps, water pumps, water valves, pneumatic cylinders, sealing of high-pressure brake systems, etc. Specification: - Material: Copper