Dope Copper Washer Set with 12 Sizes and 300 Pcs, Flat Seal Washers Kit for M5 M6 M8 M10 M12 M14 M16 M20, ProGrade Copper Metric Sealing Washers for Home, Auto, and DIY Fixes

12 Size Copper Washer Set, 300 Pcs for M5 to M20 fasteners ✔️ 12 sizes, 300 pcs, copper flat washers for sealing and load spread

This copper washer set provides flat seal washers made from copper, offering strong sealing and high heat resistance. It is ideal for electrical connections in home appliances, automotive, and DIY projects, with a sturdy plastic case for easy storage.

✅ 300 pieces total
✅ 12 metric sizes: M5, M6, M8, M10, M12, M14, M16, M20
✅ Copper material provides strong sealing and heat resistance
✅ Includes sturdy plastic case for organized storage

💡 What is a copper washer set used for in mechanical fasteners and why choose copper for sealing? Handy for distributing load and sealing connections in many projects.
- Copper washers spread load evenly to prevent pull-through
- They provide a reliable seal under vibration and heat
- Copper resists corrosion and maintains conductivity for electrical connections
- The included case keeps sizes organized for quick selection

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