Cupro Nickel Nuts Suppliers, Cupro Nickel Nut

Q: What is cupro nickel nut made of?

Cupro nickel nuts are made of a copper-nickel alloy typically containing around 70% copper and 30% nickel. This alloy is known for its excellent resistance to corrosion in seawater, making it an ideal material for use in marine environments. Cupro nickel nuts are commonly used in shipbuilding, offshore oil rigs, and other marine structures where corrosion resistance is critical.

Q: What is cupro nickel nut used for?

Cupro nickel nuts are commonly used in marine environments due to their excellent resistance to corrosion in seawater. They are often used in shipbuilding, offshore oil rigs & other marine structures where corrosion resistance is critical. Additionally, they may be used in other applications where a high degree of corrosion resistance is required, such as chemical processing plants or industrial equipment that comes into contact with corrosive substances.

What Are Cupro Nickel Nuts?

Cupro nickel nuts combine copper and nickel in an alloy that resists corrosion in conditions where standard steel fasteners fail within months. The two most common grades are CuNi 90/10 and CuNi 70/30. Both grades meet ASTM B151 and are suitable for seawater piping, high pressure flanges and structural fastening in marine environments where exposure to chloride makes carbon steel unreliable.

Cu-Ni heavy Nuts are used in many different industries, including automotive, marine, industrial manufacturing, and aerospace applications. Cu-Ni Nuts can be used to hold components together on engines, pumps, and other machinery, as well as for structural applications such as suspension systems on cars or boats. Copper Nickel Nuts can also be used in electrical wiring projects where corrosion-resistant fasteners are needed to ensure safe operation. Several types of Cupro Nickel Fasteners are available like Cupro Nickel Bolts, Cupro Nickel Washers, Cupro Nickel Stud Bolts, etc.

ASTM B151, B152 Cupro Nickel Nuts, Cu-Ni hex nuts, Copper Nickel High Tensile heavy hex nuts, Cu-Ni heavy nuts, Cu-Ni nuts, Cupro Nickel 2 Way Lock Nut, Cu-Ni lock nut Supplier & Exporter

Unlike regular steel bolts,Cupro Nickel Nuts maintain joint integrity in saltwater cooling systems, offshore platforms, and desalination plants without requiring protective coatings or frequent replacement. The tensile strength remains unaffected despite temperature extremes that cause cracking or brittleness in standard fasteners. Cu-Ni Heavy Nuts require very little maintenance and thus are a highly cost-effective option for long-service needs. We also manufactureASTM A194 GR.8C Fasteners as well as ASTM A194 GR.6 Fasteners for applications outside Marine Service.

CU-NI BRONZE HEX NUTS

CUPRO NICKEL LOCK NUTS

COPPER NICKEL HEAVY HEX NUTS

Available forms include hex nuts, heavy hex nuts, coupling nuts, and flange nuts, with thread sizes from M6 to M64. Specialty variants cover flanged hex heads for piping applications and jam nuts for structural assemblies requiring vibration resistance. Cupro-Nickel Nuts and Copper Nickel Nuts in both CuNi grades conform to ASTM B151 across that full size range.

What is cupro nickel nut made of?

Cupro nickel nuts consist of copper alloyed with 10% to 30% nickel, depending on the grade. Small additions of iron and manganese strengthen the alloy and improve corrosion resistance further. CuNi 90/10 contains 90% copper and 10% nickel; CuNi 70/30 reverses those proportions and delivers higher resistance in aggressive seawater service.

What is cupro nickel nut used for?

Shipbuilders, offshore rig contractors, and desalination plant engineers specify Copper Nickel Nuts for pipe joints, flanges, and heat exchanger assemblies. Chloride-induced corrosion disqualifies standard steel fasteners in those environments within months. Naval vessels also call for Cu-Ni Heavy Nuts wherever long-term joint integrity in seawater contact zones matters.

Cupro Nickel self locking nuts, Cu-Ni nylon insert nuts, Copper Nickel coupler nuts, Cupro Nickel Custom Nut Manufacturer & Stockist

Cupro Nickel Nuts Specification

Specifications	ASTM B151 / ASME SB151
Nut (DIA)	Metric: M6 – M110 Inch: 1/4″ – 4.5″
Nuts International Standard	IS, ANSI, ASTM DIN, ISO, JIS, GB, ASME, BS, UNI
Threads	BSF, UNF METRIC, UNC, UNEF, BSW or as required
ASME/ ANSI – American Standard	ANSI B 28.2.4 1M ANSI B 18.2.4 2M ASME B18.5 ASME B18.2.2
DIN German Standard	DIN 933, DIN 931, DIN 970, DIN 934
Head Drive style	Phillips/ Slot, Phillips, Oval, Flat 82 degree, Pan, flat undercut, Round, Truss, flat head 100 degree, binding, fillister head, indented hex head, Slotted, Six-Lobe
MTC (Manufacturer Test Certificate)	EN 10204 / 3.1
Finishing	Zinc white, (yellow, black, blue), black oxide, Dacroment, Geometry, plated zinc-nickel, anodizing, nickel plated, Inconel: Passivated Self-Colour, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Sherardized, DACROMET and Mechanically Applied coating
Production Process	M2-M24: Cold Forging, hot forging M24-M100, machining and CNC for Customized connecting element
Nuts Coating	Xylon Coated Fasteners Phosphate Coated Fasteners Hot Dipped Galvanizing Coated Fasteners Teflon Coated Fasteners Zinc Coated Fasteners Cadmium Coated Fasteners Ptfe Coated (Teflon) Fasteners
Packing	Wooden Pallet, Canton, Carton / Small Box or as required

Types Of Cupro Nickel Nuts

Cupro Nickel self locking nuts	CU-NI Hex Nuts	Copper Nickel Heavy Hex Nuts
Cupro Nickel Nylon Insert Nut	CU-NI Coupler Nuts	Copper Nickel Wing Nuts

Cupro Nickel Fasteners Price

cupro nickel bolts and nuts
US $0.5-4500 / Piece
cupro nickel bolts and nuts
US $0.5-4500 / Piece
cupro nickel alloy bolts and nuts
US $0.1-100 / Piece
Copper nickel chipboard screw
US $0.001-2 / Piece
Copper nickel fasteners
US $0.5-10 / Piece

Other Types Of Cupro Nickel Nuts

Cupro Nickel Nuts	Copper Nickel Nuts
Cu-Ni hex nuts	Cupro Nickel heavy hex nuts Supplier
Copper Nickel lock nut Exporter	Cu-Ni self locking nuts
Copper Nickel nylon insert nut	Cupro Nickel coupler nuts Manufacturer
Cu-Ni K Lock Nut Manufacturer	Copper Nickel Serrated Flange Nut
Cu-Ni Flange Lock Nut	Cupro Nickel Nylon Lock Nut Exporter
Copper Nickel Slotted Nut Supplier	Cupro Nickel 2 Way Lock Nut Distributor
Cu-Ni Custom Nut Supplier	Copper Nickel Coupler Nuts
Cupro Nickel Acorn Nut	Copper Nickel Locking Nuts Manufacturer
Cupro Nickel Square Nut	Cu-Ni Castle Nut
Cupro Nickel Wing Nut	Copper Nickel T Nuts
ISO Certified Cu-Ni Bronze hex nuts	Copper Nickel heavy hex nuts
Cupro Nickel lock nut	Copper Nickel self locking nuts
Cu-Ni nylon insert nut	Cupro Nickel coupler nuts
Copper Nickel Flex Lock Nut Exporter	Cu-Ni Steel High Nut Stockist

We are Experts in Exporting Fasteners Worldwide: We are Exporter of Copper Nickel Nuts in Worldwide Such as India, Venezuela, Peru, Azerbaijan, Italy, Canada, Turkey, Israel, Mexico, Portugal, Yemen, China, Sri Lanka, Thailand, Estonia, Iran, Switzerland, Belarus, Brazil, Ghana, Zimbabwe, Malaysia, Pakistan, United States, Nigeria, Chile, Vietnam, Lebanon, Ukraine, Namibia, Spain, Gambia, Bangladesh, Hong Kong, Ireland, South Africa, Iran, Romania, Denmark, Egypt, Bulgaria, Morocco, Costa Rica, Nepal, Poland, Saudi Arabia, Mexico, Kuwait, Hungary, Poland, Ecuador, Greece, Trinidad & Tobago,Tunisia, Slovakia, Mongolia, Russia, South Korea, Serbia, Austria, Czech Republic, Qatar, Finland, Bolivia, Indonesia, Kenya, Nigeria, Croatia, Argentina, Angola, Colombia, Belgium, Singapore, United Arab Emirates, Germany, Australia, Iraq, Bahrain, Macau, Chile, Lithuania, Jordan, United Kingdom, France, Kazakhstan, Japan, New Zealand, Bhutan, Afghanistan, Gabon, Libya, India, Taiwan, Algeria, Tibet, Netherlands, Oman, Norway, Puerto Rico, Sweden, Philippines.
We are Supplier of Fasteners in India: We are Suppliers of Cupro Nickel Nut in India Such as Mumbai, Seoul, Howrah, Ahvaz, Al Jubail, Jakarta, Noida, Baroda, Muscat, Kuwait City, Bhopal, Algiers, Doha, Chennai, Secunderabad, Dallas, Surat, Los Angeles, Jamshedpur, Indore, Geoje-si, Ahmedabad, Lahore, Rajkot, Thiruvananthapuram, La Victoria, Ranchi, Dammam, Moscow, Santiago, Visakhapatnam, Mumbai, Courbevoie, Petaling Jaya, Hyderabad, Bangkok, Sharjah, Kanpur, Coimbatore, Manama, Perth, Kolkata, Istanbul, Jaipur, London, Vung Tau, Brisbane, Caracas, Abu Dhabi, Calgary, Sydney, Houston, Gurgaon, Pune, Bogota, Jeddah, Edmonton, Karachi, Al Khobar, Aberdeen, Haryana, Bengaluru, Vadodara, Ernakulam, Madrid, Thane, Melbourne, Dubai, Lagos, Hong Kong, Singapore, Gimhae-si, Tehran, Ho Chi Minh City, Chiyoda, New York, Nashik, Colombo, New Delhi, Navi Mumbai, Pimpri-Chinchwad, Toronto, Rio de Janeiro, Ankara, Milan, Ulsan, Busan, Nagpur, Riyadh, Ludhiana, Cairo, Atyrau, Chandigarh, Granada, Montreal, Kuala Lumpur, Port-of-Spain, Faridabad, Hanoi, Mexico City.

Application Industry

Construction

Bridges

Petrochemical Industry

Ship Building

Engineering

FAQs

What composition do CuNi 90/10 and CuNi 70/30 Cupro Nickel Nuts share?

Both grades start with a copper-nickel base and add iron and manganese for strength. CuNi 90/10 runs 90% copper, 10% nickel; CuNi 70/30 flips to 70% copper, 30% nickel. The 70/30 grade handles higher chloride concentrations and suits deep offshore installations.

Which thread sizes do Cupro-Nickel Nuts cover?

Cupro-nickel hex, heavy hex, coupling, and flange nuts come in thread sizes from M6 to M64. Both common CuNi grades follow ASTM B151 standards for quality and performance across this entire size range.

Do Copper Nickel Nuts need a protective coating in saltwater service?

Copper-nickel nuts do not need any coating. When exposed to seawater, the alloy naturally creates a stable protective film on its surface. This film stops further corrosion, so no extra surface treatment or maintenance coating is required.

Cupro Nickel Nuts