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Mazin Fasteners is a reliable manufacturer and supplier of Copper Nickel 90/10 Nuts, proudly based in Muscat, Oman. We specialize in providing top-notch fastening solutions tailored for marine and industrial needs. Our nuts are crafted with precision to ensure outstanding corrosion resistance, durability, and reliability, particularly in seawater and other challenging environments. At Mazin Fasteners, we produce Copper Nickel 90/10 nuts that adhere to international standards, utilizing advanced manufacturing techniques and rigorous quality control. With a strong commitment to quality, timely delivery, and customer satisfaction, we serve industries throughout Oman and the Middle East with trustworthy, long-lasting, and efficient fastening solutions.
Our Copper Nickel 90/10 nuts are made from an alloy that consists of about 90% copper and 10% nickel, along with trace amounts of iron and manganese to boost strength and corrosion resistance. This unique composition offers remarkable protection against seawater corrosion, biofouling, and stress cracking. These nuts are known for their impressive tensile and yield strength, along with high ductility and toughness. Their mechanical stability and resistance to corrosion make them perfect for demanding marine and industrial applications where reliability and longevity are crucial.
| 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.
You’ll find Copper Nickel 90/10 nuts in a variety of settings that are exposed to seawater, brackish water, and harsh chemical environments. They’re commonly used in shipbuilding, offshore platforms, desalination plants, power generation, and marine engineering. Typical applications include piping systems, pumps, valves, heat exchangers, and flanged joints. Thanks to their excellent corrosion resistance, mechanical strength, and durability, these nuts ensure a long service life, operational safety, and minimal maintenance in critical marine and industrial applications.
Our Copper Nickel 90/10 Nuts at Mazin 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.
Mazin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Muscat, OMAN, with over 8 years of experience serving global industries.
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