Is this solid copper or copper plated?

I know that that they are solid and not plated because I sacrificed a few with the grinder to make sure. :-) Note that "solid/not plated" and "solid copper" are somewhat different questions. One would need to perform a chemical analysis to determine whether they are "solid copper" or "solid copper alloy of some sort." They are nicely formed and behave like copper; that is good enough for me.

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⚙️ Seal the deal with HELIFOUNER’s copper precision!

MULTI INDUSTRY READY - Perfect for automotive, marine, electrical, and hydraulic applications
ALL IN ONE COPPER KIT - 150 precision washers across 8 metric sizes for every project need
EFFORTLESS INSTALLATION - Lightweight, durable washers that prevent loosening and maintain pressure integrity
ENGINEERED FOR ENDURANCE - Copper material ensures superior heat resistance and corrosion protection
SEAMLESS SEAL PERFORMANCE - Flat washers with smooth surfaces reduce friction and prevent leaks

HELIFOUNER Copper Washers Assortment Kit includes 150 flat washers in 8 metric sizes (M6 to M20), crafted from high-quality copper for enhanced heat resistance, corrosion protection, and electrical conductivity. Ideal for automotive, marine, electrical, and hydraulic fittings, these smooth-surfaced washers ensure reliable sealing, reduce friction, and prevent loosening, making them a must-have for professionals seeking durable and versatile sealing solutions.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

E£ 4136

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Best international shipping I've ever tried. Worth every penny!

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Customer service was outstanding when I had questions about the product.

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Material	Copper
Outside Diameter	26 Millimetres
Washer Type	Flat
Exterior Finish	Copper,Rubber,Steel
Fastener Size	M6 M8 M10 M12 M14 M16 M20
Item Thickness	1 Millimetres
Size	M6 M8 M10 M12 M14 M16 M18 M20
Metal Type	Copper
Brand	HELIFOUNER
Number of Pieces	150
Item Diameter	6 Millimetres
Head Style	Flat
Fastener Type	Flat Washer
UPC	781573059465
Manufacturer	HELIFOUNER
Country of Origin	USA
Item model number	SLKRWASHER-COPPER--150P
ASIN	B07H299LZM

HELIFOUNER Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit

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