30-piece solid copper sump plug washer set — brand new, high quality Made from solid copper for high temperature resistance and long-lasting corrosion resistance Excellent electrical and thermal conductivity for reliable performance in metal-to-metal connections Designed for use with sump/oil drain plugs and for sealing water, fuel, and hydraulic connections Provides a dependable sealing surface to help reduce leaks and prevent fluid loss during service Durable material maintains shape and function under repeated thermal and mechanical stress Typical applications Automotive oil changes: replace crushed or corroded drain plug washers to restore a reliable seal on engines and transmissions Hydraulic and fuel systems: use on hose fittings, banjo bolts, and line connections where copper washers are required for sealing Water and marine fittings: suitable for water pump and plumbing connections that benefit from corrosion-resistant copper sealing surfaces Why choose this set Complete 30-piece supply lets you replace multiple fittings or keep spares on hand for routine maintenance Solid copper construction balances malleability and strength so the washer conforms to mating surfaces while resisting corrosion Straightforward, part-for-part replacement for applications that call for copper sump plug or sealing washers Notes Intended as replacement washers for oil drain plugs and fluid fittings that specify copper sealing washers Sold as a set of 30 pieces; verify washer size requirements for your specific fittings before installation