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Rinku Fasteners, based in Kolkata, India, has built a solid reputation as a reliable manufacturer and supplier of high-quality industrial fasteners, including Copper Nickel 90/10 Nuts. These nuts are celebrated for their durability, resistance to corrosion, and precision engineering, making them dependable in tough marine and industrial settings. Rinku Fasteners employs cutting-edge manufacturing techniques and strict quality control measures to ensure that every nut meets global standards. Their Copper Nickel 90/10 Nuts are particularly resistant to seawater, biofouling, and high temperatures, making them perfect for critical applications. With a strong focus on quality and customer satisfaction, Rinku Fasteners caters to a variety of industries with trustworthy fastening solutions.
Copper Nickel 90/10 Nuts are made up of 90% copper and 10% nickel, with small amounts of manganese and iron added to boost strength and corrosion resistance. This alloy is known for its outstanding resistance to seawater corrosion, stress corrosion cracking, and erosion. In terms of mechanical properties, these nuts showcase good tensile and yield strength, impressive ductility, and consistent performance across different temperatures. Their ability to maintain structural integrity in marine and chemically aggressive environments makes them perfect for demanding applications. The blend of toughness, corrosion resistance, and durability guarantees long-lasting and reliable fastening.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
| Cupro Nickel 90/10 | 88.6 min | 1.0 max | 0.05 max | 9-11 max | 1.8 max | 1 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Cupro Nickel 90/10 | 0.323 lb/in3 at 68 F | 2260 F | 50000 psi | 20000 psi | 30 % |
| Specifications | ASTM B151 / ASME SB151 |
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 – M100 | 3/6″ – 4″ | Custom Sizes |
| Length | 3 mm – 200 mm | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc. |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc. |
| Surface Treatment | Passivation /plain |
| Others Factor | OEM, ODM, ±0.03MM tolerance |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
| Packing | IN BULK: carton, pallet, Small Boxes or customer request |
| Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Test Certificate | As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merk blatt AD 2000 W2 Certified |
| Certification | Dual Certified As per ASTM & ASME Codes |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Copper Nickel 90/10 Nuts find extensive use in industries that operate in marine, offshore, and corrosive settings. They are particularly well-suited for shipbuilding, desalination plants, offshore platforms, heat exchangers, seawater piping systems, and marine hardware. Their remarkable resistance to seawater corrosion and biofouling makes them ideal for critical components that are regularly exposed to saltwater.
Our Copper Nickel 90/10 Nuts at Rinku Fasteners are properly packed so that they do not reach the client in a damaged state. Every nut is covered and packed separately in strong and moisture-proof packets to avoid the spoilage and deterioration. Proper labeling helps in quick identification and management of the items. Our packing process ensures that the nuts do not lose their quality and are ready for use, which is a clear depiction of our quality products and excellent customer relations.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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