China Factory Suppliers Brass Copper Flat Plate Fender Washers Gasket Punched Ring Washer for Hardware Fasteners

Copper washers are widely used as sealing gaskets in automotive, plumbing, and industrial applications. They effectively prevent leaks in high-pressure systems such as fuel injectors, brake lines, and oil drain plugs.

Copper is highly malleable and softer than many other metals. When tightened, it deforms slightly to fill any microscopic imperfections between the mating surfaces, creating a reliable airtight and watertight seal.

Generally, it is recommended to replace copper washers once they have been compressed. However, they can be reused if they undergo annealing (heating and cooling) to restore their original softness and malleability.

Yes, copper possesses excellent natural resistance to corrosion and rust. This makes copper washers highly durable and suitable for use in environments exposed to moisture, oils, and chemical elements.

To select the correct size, you need to measure the inner diameter (ID) to match the bolt size, the outer diameter (OD) to ensure it fits the mating surface, and the thickness required to handle the specific pressure of your application.