10PCS/Pack 12x22x2mm Copper Washer Solid Gasket Sump Oil Seal Key benefits Reliable oil leak prevention: copper washer provides an effective seal for oil sump drain plugs and fittings, helping to prevent leaks and oil loss. Corrosion resistance and durability: copper material offers good resistance to oil and environmental exposure, supporting long service in automotive and machinery applications. Spaceefficient seal: thin 2 mm profile allows a flush seal in tight spaces while still delivering a solid gasket. Consistent sealing performance: solid washer construction distributes load evenly across sealing surfaces for a dependable seal during operation. Key attributes Material: Copper Type: Washer / Gasket / Sump Oil Seal Size: 12x22x2 mm (inner bore 12 mm, outer diameter 22 mm, thickness 2 mm) Pack size: 10 pieces per pack Function: Sump oil seal for sealing drain plugs and related oil fittings Compatibility: Suitable for applications requiring a 12 mm bore and a 22 mm outer diameter copper washer Applications and use cases Engine oil sump drain plug seal: worn washers during oil changes to maintain a reliable seal. Oil filter housing or oil line fittings: use as a copper washer in sealing interfaces that require copper gaskets. Gearbox or hydraulic sump plugs: appropriate for small oil sump seals where copper washers are specified. How to use Clean sealing surfaces before installation. Place the copper washer between the bolt head/nut and the sealing surface. Tighten to the manufacturer's torque specification to ensure a proper seal. with a washer at every service to maintain sealing performance. Additional considerations Store in a dry environment to minimize oxidation before use. Do not reuse deformed or damaged washers; with a washer from the pack. This description maintains the stated product specifications and features, presenting clear, readerfriendly details suitable for informed decisions.