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Copper Alloy Cup Washers for Machinery Fixing

Copper Roves(Cup-type flat washers‌) are a common fastener accessory, mainly used to fix and protect fasteners such as bolts and nuts to prevent them from loosening or wearing. ‌Copper Roves(Cup-type flat washers‌)are usually made of metal materials, such as stainless steel or aluminum alloy, and have high strength and corrosion resistance.Whether you're working on mechanical equipment, automobile manufacturing, or electronic assemblies, Copper Roves are engineered to meet your needs with precision and excellence.

Materials: Silicon bronze, phosphor bronze, aluminum bronze, copper materials are available
Standard:ASME, DIN, GB, BS, etc. Special sizes can be customized
Basic packaging: plastic bag + neutral carton (without logo) + solid wood palle
Availability:
Quantity:

Copper Roves

1/4-20

5/16-18

3/8-16

1/2-13

9/16-12

5/8-11

3/4-10

M3-0.5

M4-0.7

M5-0.8

M6-1.0

M8-1.25

M10-1.5

M12-1.75

M16-2.0

M20-2.5


Product Overview


Our Corrosion-Resistant Copper Nails for Electrical are specialized fasteners engineered for secure, conductive mounting in electrical systems and grounding applications. Made from 99.9% high-purity electrolytic copper with a multi-layer protective finish, these nails provide exceptional electrical conductivity and long-term corrosion resistance—making them ideal for grounding, bonding, and fixture mounting in both indoor and outdoor electrical installations .


Product Specifications


Parameter

Value

Material

Electrolytic Copper (99.9% pure Cu) with tin-chromate protective coating

Size Range

3mm - 6mm diameter (lengths: 16mm - 50mm in 5mm increments)

Head Style

Flat head, countersunk (82° countersink angle for flush mounting)

Tensile Strength

300 - 350 MPa (minimum ultimate tensile strength)

Electrical Conductivity

98% IACS (excellent for low-resistance grounding)

Corrosion Resistance

10,000+ hours salt spray resistance (ASTM B117 testing)

Point Style

Diamond point for easy driving without pre-drilling


Features


High electrical conductivity ensures <0.01Ω contact resistance, critical for effective grounding and lightning protection systems

• Multi-layer corrosion-resistant coating (tin plating + chromate passivation) protects against moisture, oxidation, and industrial pollutants

• Smooth shank design with controlled friction minimizes damage to insulation materials during installation in cable management systems

• Easy driving with standard hammer or nail gun, suitable for wood, plastic, drywall, and soft metals (aluminum, brass)

• UL listed for grounding applications, compliant with major electrical codes worldwide


Applications


Essential for electrical panel grounding, lightning protection system installations, cable tray mounting, and fixture grounding in residential, commercial, and industrial buildings. Used in telecom infrastructure, renewable energy systems (solar, wind), and data centers where reliable conductive fastening is critical to safety and performance .


FAQ


Q: Are these nails compliant with NEC standards?

A: Yes, fully meet NEC Article 250 requirements for grounding electrodes and equipment grounding conductors.

Q: What coating provides corrosion resistance?

A: Electrolytic tin plating (5-8μm thickness) with chromate passivation creates a protective barrier that withstands harsh environments.

Q: Available with insulated heads?

A: Yes, insulated head variants with 1kV-rated nylon insulation are available for non-conductive mounting in sensitive electrical applications.


DECOPPER Metal It is an enterprise dedicated to the research and development and production of high-quality copper materials and copper products.

CONTACT US

WhatsApp: +8613600315221
Tel: +86-757-8679-1363
Phone: +86-136-0031-5221
Email:  mingyang-2212@163.com
             kang@mm-edm.com
Add: Jidingwei Industrial Zone, Pingzhou, Pingnan, Guicheng Street, Nanhai District, Foshan City, Guangdong, China

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