10PCS/Pack 18x25x2mm Copper Washer Solid Gasket Sump Oil Seal provides a durable sealing solution for oil drain plugs and sump bolts. Made from copper, these washers form a reliable crush seal, resist oil exposure, and adapt to mating surfaces to help prevent leaks. Key attributes Size: 18x25x2 mm (inner diameter 18 mm, outer diameter 25 mm, thickness 2 mm) Material: Copper Type: Solid gasket washer for oil seals Pack quantity: 10 pieces per pack Function: Seals oil drain plugs and sump bolts to prevent leaks under automotive, motorcycle, and small engine conditions Performance: Copper offers good oil resistance, elevated temperature tolerance, and the ability to conform to irregularities for a tight seal Compatibility and use Suitable for applications that require an 18x25x2 mm copper washer as a crush seal for oil drain plugs and sump bolts Commonly used in automotive and motorcycle maintenance, as well as small engine and machinery servicing where this washer size is specified Ideal for replacing worn or damaged drain plug washers to restore proper sealing Applications and use cases Replacing a worn oil drain plug washer on a car or motorcycle to stop oil leaks Sealing sump bolts during oil pan service or engine maintenance Servicing small engines or generators that require an 18x25x2 mm copper washer for oil or fluid fittings Notes Verify that the washer size matches the drain plug or fitting requirements before use Inspect surfaces for damage or deformation and washers if deformed or cracked For results, follow standard torque specifications and ensure clean mating surfaces prior to installation