10PCS/Pack 20x28x2mm Copper Washer Solid Gasket Sump Oil Seal Overview This 10piece set provides solid copper washers designed to seal joints and fittings in automotive, industrial, and equipment applications. With precise 20x28x2 mm dimensions, these copper washers offer reliable sealing where a crushtype gasket is required. The copper material provides good malleability for a tight seal and smooth performance under vibration. Key attributes Material: solid copper Size: inner diameter 20 mm, outer diameter 28 mm, thickness 2 mm Pack quantity: 10 washers per pack Type: copper washer gasket (crush/seal type) Function: seals oil, fuel, and hydraulic connections to prevent leaks Performance: corrosionresistant, stable under heat and fluids typically found in automotive and industrial environments Compatibility: suitable for standard 20x28x2 mm sealing applications requiring a copper washer Use case: suitable for sump oil seals and related joint sealing Benefits Reliable seal: deforms to conform to mating surfaces, creating a tight seal under torque Oil and fluid compatibility: designed for use with motor oil, hydraulic fluids, and similar liquids Durable and corrosion resistant: copper construction offers long service life in typical automotive and mechanical environments Value pack: ten washers per pack ensures replacement availability for multiple connections or future service Applications Automotive engine and transmission oil drain plug seals or sump seals requiring a 20x28x2 mm copper washer? Hydraulic fittings and fluid lines that require a copper sealing washer for leak prevention Fuel line connections or other fluid system joints that specify a 20x28x2 mm copper gasket Usage guidelines Ensure mating surfaces are clean and of debris before installation Use a copper washer for each connection to ensure a proper seal Inspect for leaks after installation and reseal if Confirm that the 20x28x2 mm dimensions match the receiving hardware before use Package contents 10 x copper washers (20x28x2 mm) This product maintains a professional, clear design suitable for automotive and industrial use, delivering dependable sealing performance with every installation.