Copper Washers | Copper Pressed Washers | Copper Flat Washers | Copper Sealing Washers
Manufacturer–Exporter from India | Copper Washers
PRICE: US$ 18/Kilogram CIF USA Port
Overview
We are one of India’s most trusted manufacturers and exporters of Copper Washers, Copper Pressed Washers, Copper Flat Washers, Copper Sealing Washers, and Copper Bonded Washers. With decades of precision press-tool engineering, we supply OEM-quality copper washers to customers in the USA, UK, Germany, Australia, UAE, and across Southeast Asia. Our copper washers are produced from high-conductivity, oxygen-free, and electrolytic tough pitch (ETP) copper grades, ensuring superior electrical conductivity, excellent corrosion resistance, and outstanding thermal performance.
What Are Copper Washers?
Copper washers are disc-shaped pressed components produced from copper sheet or strip by stamping, blanking, or progressive die pressing. They distribute load, provide electrical continuity, create leak-proof seals, and absorb vibration between fastener and mating surfaces. Related terms include: copper flat washers, copper sealing rings, copper crush washers, copper bonded washers, copper shim washers, copper penny washers, copper fender washers, copper annealed washers, and copper press-fit washers. Copper’s high electrical conductivity (100% IACS), excellent thermal conductivity (385 W/m·K), and superior malleability make copper washers the preferred choice in electrical, hydraulic, plumbing, automotive, and instrumentation applications.
Material Grades & International Equivalents
ASTM / CDA (USA): C11000 (ETP Copper) standard electrical-grade >99.9% purity | C10100 (OFE Copper) oxygen-free highest conductivity | C10200 (OF Copper) oxygen-free excellent formability | C12200 (DHP Copper) phosphorus-deoxidised ideal for hydraulic sealing | C14500 (Tellurium Copper) free-machining copper
DIN / EN (Europe): CW004A (Cu-ETP) per EN 13601 | CW008A (Cu-OF) | CW024A (Cu-DHP) | CW118C (CuTeP)
BS (UK): C101 high conductivity | C103 oxygen-free | C106 phosphorus deoxidised
IS (India): IS 191 Grade ETP, FRHC, OFC | JIS (Japan): C1100, C1020, C1220
Types of Copper Washers We Manufacture
Our product range covers: Copper Flat Washers (DIN 125, DIN 9021, ASME B18.22.1), Copper Spring Lock Washers (DIN 127, DIN 128), Copper Sealing / Crush Washers for hydraulic and pneumatic fittings, Copper Bonded Sealing Washers (NBR/EPDM bonded), Copper Shim Washers with precision ±0.01 mm thickness, Copper Penny / Fender Washers, Copper Dome / Ogive Washers, Copper Wave Washers, Copper Tab / Anti-rotation Locking Washers, and Copper Repair Washers.
Design & Manufacturing Capabilities
Our engineering team works from customer drawings (DXF, DWG, PDF, STEP) and samples to design precision progressive and transfer die tooling. Press capacity: 10 to 500 tonnes, single-action and progressive. Thickness range: 0.3 mm to 10 mm. Inner diameter: M2 to M100 (custom available). Outer diameter: 5 mm to 300 mm. Surface finishes available: bright, polished, annealed, tinned, nickel-plated, silver-plated. Standard tolerances: ±0.05 mm OD/ID; precision grade ±0.01 mm. Production volumes from 100 pcs prototype to 50 million pcs/year. Secondary operations include annealing, deburring, coining, tapping, drilling, and electrolytic tinning.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | ETP Copper C11000 / C10200 / DHP C12200 |
| Hardness | 55–90 HV (annealed: 45–60 HV) |
| Tensile Strength | 200–380 MPa |
| Conductivity | ≥ 98% IACS (ETP); ≥ 99.9% IACS (OFC) |
| Thickness Tolerance | ±0.05 mm standard; ±0.01 mm precision |
| Surface Finish | Ra 0.8 – 3.2 µm |
| Max Operating Temp | 200°C bare; 300°C with Ni plating |
| Standard | DIN 125, ISO 7089, ISO 7090, ASME B18.22 |
Industries & Applications
Electrical & Electronics (busbar washers, grounding terminals, transformer connections), Hydraulics & Pneumatics (crush sealing washers for pipe joints and valves), Automotive (engine drain plug seals, fuel line washers, radiator bolt seals), Plumbing & HVAC (compression fitting washers, boiler sealing rings), Instrumentation (precision shim washers, sensor mounting washers), Defence & Aerospace (vibration damping, conductive grounding washers), and Renewable Energy (solar, wind grounding, EV battery terminals).
ISO Certification & Quality Standards
We are an ISO 9001:2015 certified. Our copper washer production adheres to DIN 125-1, ISO 7089, ISO 7090, and ASME B18.22.1 dimensional standards. All incoming copper is verified by spectro analysis / PMI testing. Outgoing inspection includes 100% visual check and AQL sampling for dimensional and conductivity verification. Packing: anti-tarnish VCI poly bags; wooden export crates per ISPM-15. Certificates provided: Mill Test Certificate (MTC), Certificate of Conformity (CoC), RoHS Compliance Declaration, REACH SVHC Declaration.
Frequently Asked Questions
Q1. What is the difference between Copper Flat Washers and Copper Sealing Washers?
Copper flat washers (DIN 125) distribute bolt load in general-purpose fastening. Copper sealing / crush washers, made from annealed or DHP copper, deform under compression to create a metal-to-metal hydraulic seal at joints, plugs, and fittings — ideal for drain plugs, hydraulic fittings, and fuel system connections.
Q2. Can we manufacture custom-size copper washers not found in standard catalogues?
Yes. We manufacture washers to any custom OD, ID, and thickness from customer-provided drawings or samples. Minimum quantity for custom tooling is 5,000 pcs. Rush prototypes available in 7–10 working days.
Q3. What copper grade is best for electrical grounding washers?
C11000 ETP Copper (99.9%+ purity, ≥98% IACS conductivity) is recommended for grounding and electrical continuity applications. For ultra-low oxygen requirements such as vacuum or high-frequency applications, C10100 OFE copper is specified.
Q4. Do you supply annealed (soft) copper washers for crush sealing?
Yes. Annealed copper washers in fully soft condition are ideal for crush sealing — the softness ensures perfect deformation and leak-free sealing under torque. We anneal in a controlled atmosphere furnace to prevent surface oxidation.
Q5. What is your minimum order quantity (MOQ)?
For standard sizes: MOQ is 500 pcs. For custom/non-standard sizes requiring tooling: MOQ is 5,000 pcs. Trial and sample orders are welcome for new customers.
Q6. Are your copper washers RoHS and REACH compliant?
Yes. All our copper washers comply with RoHS 2 (Directive 2011/65/EU) and REACH SVHC regulations, and are manufactured without any restricted hazardous substances.
Why Choose us for Copper Washers?
With 30+ years of copper press-part manufacturing experience, an in-house toolroom for progressive die design and maintenance, and exports to 40+ countries across 5 continents, We are your ideal global partner. Standard items are available ex-stock; custom orders are completed within 3–4 weeks. We offer competitive CIF pricing of USD 8–15/kg depending on grade and quantity, with full documentation including MTC, CoC, RoHS, and REACH certificates.
Request a Quote – Copper Washers & Copper Pressed Washers
Tell us your required size (OD, ID, thickness), material grade, quantity, and applicable standards — we will respond within 24 hours with pricing and lead time. Contact us today: Email: sales@cableglandsindia.com | Phone: +91 22 4344 9300. Request a sample, download our product catalogue, or WhatsApp us directly for a fast response.