This pack contains 10 copper washers designed as solid gaskets for sump oil seals. Each washer measures 8x20x2 mm (inner diameter 8 mm, outer diameter 20 mm, thickness 2 mm). Made from copper, these washers provide reliable sealing in oil systems and offer good corrosion resistance. Key benefits Reliable leak sealing: copper washers crush slightly to form a tight seal between bolt head and mating surface, helping prevent oil leaks in sump and related connections. Easy to install and : supplied in a convenient 10piece pack for quick replacement during maintenance or oil changes. Oilsafe material: copper is well suited for oily, temperature environments and resists corrosion, helping maintain sealing performance over time. Key attributes Material: copper; solid gasket Size: 8x20x2 mm (inner Ø 8 mm, outer Ø 20 mm, thickness 2 mm) Quantity: 10 pieces per pack Compatibility: suitable for applications requiring an 8 mm bolt crush washer with a 20 mm outer diameter Functionality: crush washer style gasket designed for sump oil seals and related oil system connections Performance: designed for oil environments with good thermal tolerance and corrosion resistance Applications Replacing the drain plug gasket on automotive engine oil pans during oil changes Sealing oil pan connections on motorcycles or small engines that use 8 mm bolts Sealing oil or lubrication system fittings in machinery and equipment where an 8 mm bolt crush washer is specified Usage guidance Place the washer between the bolt head and the mating surface, then tighten to the manufacturer's torque specification. Do not reuse crush washers after removal; with a washer to ensure a proper seal. Ensure mating surfaces are clean and of debris before installation to achieve sealing performance.