100 Pack M5 Copper Flat Washers 5X9X1mm Real Deal Rust Proof Hardware Fasteners Legit Corrosion Resistant Screw Backing Plates for Rugged Outdoor Projects and Car Repairs

Bulk M5 Copper Flat Washers for Rust Resistance
✔️ 100 pack Copper washers 5mm 0.2in inner 9mm 0.35in outer 1mm thick

This batch of metal flat washers distributes load evenly across fastener joints while blocking moisture and road grime from eating away at your gear. You will find these corrosion resistant backing plates perfect for automotive suspension kits, marine railings, and heavy duty woodworking frames that face constant humidity.

✅ Genuine solid copper alloy delivers superior rust and salt air protection
✅ Smooth deburred edges prevent damage to soft metals and delicate circuit boards
✅ Standard M5 thread compatibility works seamlessly with common bolts and nuts
✅ Heavy 100 piece carton cuts down on reorder trips for busy fabrication shops
✅ Exact cut geometry holds firm under vibration without slipping over time

💡 How do non ferrous spacer rings handle vibration in rough terrain setups
Rolling out these handy copper backers instantly clears up premature joint failure on your daily driver.
- High purity copper lining absorbs shock waves better than cheap steel discs
- Wide 9mm 0.35in footprint spreads bolt pressure evenly across 5mm 0.2in holes so threading stays stripped free
- Humidity proof coating locks out winter road salt and keeps engine mounts looking fresh year round

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