325pcs Copper Crush Washer Assortment Kit Flat Oil

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Comprehensive 325-Piece Kit
Includes 325 premium copper sealing washers in 10 popular metric sizes (M5–M14). Perfect for mechanics, DIY enthusiasts, and maintenance professionals needing reliable sealing and leak prevention for automotive, hydraulic, or household repairs.

High-Quality Copper Construction
Crafted from pure red copper for superior heat resistance, electrical conductivity, and corrosion protection. These flat washers deliver long-lasting performance and prevent oxidation, making them ideal for high-temperature and high-pressure environments.

Secure Leak-Proof Seal
Each washer provides a tight, even fit that distributes pressure uniformly to prevent leaks, loosening, or surface damage. Perfect for sealing oil drain plugs, banjo bolts, and hydraulic fittings.

Organized & Easy to Use
Comes in a durable, transparent storage case with clearly labeled compartments and a detailed size chart for quick selection. Keeps your washers neatly arranged and ready for any job.

Versatile Applications
Ideal for use in automotive, marine, plumbing, electrical, and industrial settings. Compatible with screws, nuts, and bolts of matching sizes for a variety of sealing and fastening needs.

Package Includes (10 Sizes / 325 Pieces):

• M5×9×1mm – 55 pcs

• M6×10×1mm – 40 pcs

• M6×12×1mm – 30 pcs

• M8×12×1mm – 30 pcs

• M8×14×1mm – 30 pcs

• M10×14×1mm – 30 pcs

• M12×16×1mm – 30 pcs

• M12×18×1.5mm – 30 pcs

• M14×18×1mm – 30 pcs

• M14×20×1mm – 20 pcs

Features:
✔ Smooth finish without burrs
✔ Excellent corrosion and wear resistance
✔ Long-term stability under heat and pressure
✔ Easy identification and organized storage box

Exterior Finish Copper Product Dimensions 5.35 x 3.81 x 0.7 inches; 9.59 ounces Material Copper Outside Diameter 9-20 Millimeters Washer Type Flat Fastener Size M5, M6, M8, M10, M12, M14 Size Copper_Washers_325Pcs

• Fast & Free Shipping on all orders
• Orders ship within 1–3 business days
• Tracking is provided once your item ships
• We ship only within the continental U.S. (No shipping to Alaska, Hawaii, or Puerto Rico)

We offer a 30-Day Return Policy for your convenience and peace of mind.
Customer satisfaction is our highest priority.

We’re committed to making sure every customer is 100% satisfied. If you experience any issues with your order, please send us a message, we're here to help!