10PCS/Pack 7x18x2mm Copper Washer Solid Gasket Sump Oil Seal This pack provides ten copper washers sized 7x18x2 mm for sealing applications. The washers are solid copper, designed to function as gaskets and sump oil seals in smallbore connections. They offer a reliable, crushtype seal when used with compatible bolts and housings. Key benefits Reliable seal for oil drain plugs and other fittings with a 7 mm bore. Copper material is soft and malleable, allowing the washer to conform to sealing surfaces and fill gaps without damaging threads. Good corrosion resistance and heat tolerance suitable for automotive and industrial environments. Lightweight and easy to ; comes in a convenient 10piece pack for quick servicing. Key attributes Material: copper (solid gasket) Size: inner diameter 7 mm, outer diameter 18 mm, thickness 2 mm Quantity: 10 pieces per pack Type: washer / gasket for sump oil seal Compatibility: designed for components requiring 7x18x2 mm copper washers Applications Automotive oil pan drain plug seals for engines or gearboxes with 7 mm drain plug openings Sump plug seals in transmissions, differentials, and related systems using matching 7x18x2 mm copper washers Replacement washers for smallbore sealing tasks that require 7x18x2 mm copper washers Usage notes Use a washer for each service; inspect for deformation and if bent or damaged Do not reuse damaged washers Verify compatibility with your bolt size and sealing surfaces; torque to the appropriate specification to avoid leaks This description reflects the product's stated specifications, including quantity (10 pcs), dimensions (7x18x2 mm), material (copper), and intended function as a solid gasket and sump oil seal.