uxcell 75Pcs M5 Flat Washer Copper Washer Sealing Rings, 5mm ID 9mm OD 1mm Thickness Copper Crush Washers Metric Sealing Gasket for Plumbing Machinery Automotive

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About This What You Get: Each package contains 75 copper washers, inner diameter 5mm/0.2", outer diameter 9mm/0.35", thickness 1mm/0.04" Pure Copper Material: Our washers are made of high-purity copper, offering exceptional thermal and electrical conductivity, and they are resistant to high temperatures, corrosion and rust, and can provide long-term service Function: The pure copper flat washer is specifically designed to provide optimal electrical grounding and heat dissipation, while also preventing fastener loosening from vibration or thermal cycling in high-performance applications How to Use: Before installation, ensure all contact surfaces are clean and free of debris. Place the pure copper washer evenly between the components to be sealed. Using appropriate tools, tighten the fasteners gradually avoid over-tightening to prevent deformation and maintain optimal sealing performance Wide Applications: Suitable for automotive oil circuit sealing, hydraulic pipelines, home appliance compressors, ship salt water environment, and industrial equipment flange connections; can replace nylon or rubber gaskets for high-temperature conductive occasions, such as spark plugs, transformer grounding, gas valves, etc Overview Material : Copper Outside Diameter : 9 Micron Washer Type : Flat Fastener Size : M5 Item Thickness : 1 Micron Show more