Metric Copper Sealing Washers (M4–M20)

Metric Copper Sealing Washers – Leak-Proof Seals for Engines & Industrial Machinery

Ensure airtight and liquid-tight seals with our premium **metric copper sealing washers** (M4–M20). Designed for sump plugs, oil pans, and flange connections, these reusable flat ring gaskets provide superior corrosion resistance and thermal conductivity in demanding environments.

Key Specifications:

• Material: Red Copper – high thermal conductivity, anti-seize properties
• Sizes: Metric Thread Compatibility (M4, M5, M6, M8, M10, M12, M16, M20)
• Design: Flat ring gasket – compresses for perfect fit on bolted joints
• Applications: Automotive engines, oil pans, gearboxes, hydraulic systems, industrial pumps

Why Choose Our Copper Washers?

• ✅ **Leak-Proof Sealing** – conforms to irregular surfaces for perfect compression
• ✅ **Reusability** – soft copper allows for multiple disassembly/reassembly cycles
• ✅ **Corrosion Resistance** – withstands oil, coolant, and moisture exposure
• ✅ **High Thermal Conductivity** – ideal for heat-sensitive joints (e.g., exhaust systems)

Common Use Cases:

• Sealing oil pan bolts on car engines
• Preventing leaks on sump plug threads
• Creating tight flange connections in hydraulic systems
• Mechanical repairs requiring conductive seals (e.g., electrical grounding)
• DIY projects needing non-reactive gaskets (food-grade compatible)

Package Options:

Available in 10pcs, 50pcs, or 100pcs packs. Most popular: 50pcs mixed sizes (M4–M20).

Note: For optimal performance, torque bolts to manufacturer specifications after installation.