10PCS/Pack Copper Washer Solid Gasket Sump Oil Seal is a pack of copper washers designed to provide a reliable seal for oil system connections. Each washer is sized for 8x20x2 mm applications, with an inner diameter of 8 mm, outer diameter of 20 mm, and a thickness of 2 mm. Key benefits Reliable oil seal: copper washers form a crushfit seal that conforms to the mating surfaces, helping prevent oil leaks at drain plugs and sump joints. Durable and corrosion resistant: copper withstands exposure to engine oil and temperatures, offering longlasting sealing performance. Precise sizing for easy replacement: pack includes washers sized 8x20x2 mm to match standard sealing surfaces, ensuring compatibility with common oil drain plug configurations. Easy to install: simple, straightforward replacement that works with compatible drain plugs and sump seals. Value pack: 10 washers per pack provide readiness for multiple seals or spare replacements. Key attributes Material: copper (solid gasket) Size: 8x20x2 mm (inner diameter 8 mm, outer diameter 20 mm, thickness 2 mm) Pack quantity: 10 pieces Type: solid gasket / sump oil seal Function: creates a tight seal in oil systems to prevent leaks Compatibility and use Compatible with standard 8x20x2 mm sealing surfaces used on oil sump drain plugs and similar oil system joints. Suitable for automotive engines, motorcycles, and small engines that require copper crush washers for oil seal applications. Also applicable to hydraulic or gear oil sump drain plug seals where an 8x20x2 mm copper washer is specified. Use cases Automotive engine oil drain plug seal: worn or damaged washers during oil changes to maintain a reliable seal. Motorcycle engine sump drain: fit copper washers to ensure a leak drain plug connection after maintenance. Small engine or hydraulic equipment sump seals: seal oil or hydraulic sump plugs in compact systems that use 8x20x2 mm copper washers. Notes For results, use as a crush washer in conjunction with the mating surface specified by the equipment manufacturer. Do not reuse washers after compression; with a washer from the pack to ensure a proper seal.