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Copper Nickel Fasteners Supplier

Corrosion is a prevalent problem that affects every industry globally. It’s a natural process that causes a deterioration of metal components caused by environmental factors. One solution to corrosion is the use of copper-nickel fasteners.Cu Ni Nuts are widely used in the marine, oil & gas & chemical industries because of their proven resistance to corrosion.

Copper Nickel Fasteners are copper and nickel alloys that resist seawater, brine solutions, and biofouling. These fasteners can withstand temperatures ranging from -452°F to 500°F, making them ideal for high-temperature applications. The composition of copper-nickel fasteners varies & the most commonly used alloys range from CuNi 90/10 and CuNi 70/30.

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Copper Nickel Fasteners have unique features that make them stand out against other fasteners. They include superior corrosion resistance, excellent strength, high-temperature resistance & anti-fouling properties also these features make them the top choice for fasteners for the marine, oil & gas & chemical industries. We offer a wide range of products, includingDuplex Steel UNS S31803 Nuts, Stainless Steel 409 Nuts, & many more.

Cu Ni Fasteners offer a range of benefits that make them a popular choice in various industries. They have excellent corrosion resistance, ideal for harsh marine and offshore environments. They can withstand exposure to seawater and other corrosive elements without deteriorating or losing their strength. They have high thermal and electrical conductivity, which makes them useful in electrical & electronic applications. Copper nickel fasteners can transfer heat and electricity efficiently, ensuring reliable performance.

They are highly durable and resistant to wear, making them suitable for high-stress applications. ASTM B151 Copper Nickel Fasteners are also easy to machine, allowing for quick and easy installation. Copper Nickel Fasteners provide a reliable and cost-effective solution for various applications where durability, corrosion resistance & electrical conductivity are essential. At Neelkamal Alloys LLP, we offer a variety of high-quality Copper Nickel Products, including Copper Nickel 90/10 Fasteners, Copper Nickel 70/30 Fasteners and more.

 Cu Ni Bolts are the ideal solution to corrosion-related problems in the marine, oil & gas, and chemical industries. With their unique features like corrosion resistance, anti-fouling properties, and high-temperature resistance, they provide impressive benefits that lower the cost of maintenance & reduce the frequency of replacements.

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Specification For Copper Nickel Fasteners

Standard ASTM B151 / B152, ASME SB151 / SB152
Bolt / Screw Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size M1.6 – M12
Self Tapping Screw Size No.2 – No. 14
Length 3 mm to 200 mm
Threads UNF, BSW, BSF, METRIC, UNC, or as required
Fasteners
  • DIN : DIN 934, DIN 931, DIN 970, DIN 933
  • UTS : UNEF, NPT, UNC, UNS, UNF, NPTF
  • ISO : JIS standards, ISO 4033, ISO 4032,
  • ANSI – American National Standards Institute
  • ASME B18.5
  • ANSI B 28.2.4 1M
  • as per defined in ASME B16.5 standard Copper Nickel 70/30 Stud Bolt length
  • ANSI B 18.2.4 2M
  • as per defined in ASME B18.2.2 CuNi 70/30 Hex nuts
Form Hex, Threading, Square, Round as per Gauge Etc.
Raw materials Source JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc.
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically
Test Certificate as per EN 10204 / 3.1 Manufacturer Test Certificate
Additional Certifications PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Production process M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC
Copper Nickel Fasteners

Copper Nickel Hex Bolt Dimension

NOMINAL SIZE (D)BODY DIAMETER HEAD THICKNEASTM  ACROASTM  THE FLATS ACROASTM CORNERS 
 D (MAX)D (MIN)H (MAX)H (MIN)F (MAX)F (MIN)C (MAX)C (MIN)
m1010.009.786.636.1717.0015.7318.4817.77
m1212.0011.737.764.2419.0017.7320.7820.03
m1414.0013.739.098.5122.0020.6724.2523.35
m1616.0015.7310.329.6824.0023.6727.7126.75
m2020.0019.6712.8812.1230.0029.1634.6432.95
m2424.0023.6715.4414.5636.0035.0041.5739.55
m3030.0029.6719.4817.9246.0045.0053.1250.85
m3636.0035.6123.3821.6355.0053.8063.5160.79
m4242.0041.3826.9725.0365.0062.9075.0671.71
m4848.0047.3831.0728.9375.0072.6086.6082.76
m5656.0055.2636.233.8085.0082.2098.1593.71
m6464.0063.2641.3238.6895.0091.80109.70104.65
m7272.0071.2646.4543.55105.00101.40121.24115.60
m8080.0079.2651.5848.42115.00111.00132.72126.54
m9090.0089.1357.7454.26130.00125.50150.11143.07
m10090.0099.1363.960.10145.00140.00167.43159.60

Size Chart of Copper Nickel Nuts

Nut Size (mm)
Diameter* (mm)
Height (mm)
Hex Nut
Jam Nut
Nylock Nut
2mm
4
1.6
1.2
2.5mm
5
2
1.6
3mm
5.5
2.4
1.8
4
4mm
7
3.2
2.2
5
5mm
8
4
2.7
5
6mm
10
5
3.2
6
7mm
11
5.5
3.5
8mm
13
6.5
4
8
10mm
17
8
5
10
12mm
19
10
6
12
14mm
22
11
7
14
16mm
24
13
8
16
18mm
27
15
9
18.5
20mm
30
16
10
20
* This is the diameter across the flats. It is also the size of wrench to use.

Dimensions of Copper Nickel Heavy Hex Nuts

Nominal Size or Basic Major Thread Diameter
F
G
H
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
1/4
.2500
1/2
.500
.488
.577
.556
15/64
.250
.218
5/16
.3125
9/16
.562
.546
.650
.622
19/64
.314
.280
3/8
.3750
11/16
.688
.669
.794
.763
23/64
.377
.341
7/16
.4375
3/4
.750
.728
.866
.830
27/64
.441
.403
1/2
.5000
7/8
.875
.850
1.010
.969
31/64
.504
.464
9/16
.5625
15/16
.938
.909
1.083
1.037
35/64
.568
.526
5/8
.6250
1-1/16
1.062
1.031
1.227
1.175
39/64
.631
.587
3/4
.7500
1-1/4
1.250
1.212
1.443
1.382
47/64
.758
.710
7/8
.8750
1-7/16
1.438
1.394
1.660
1.589
55/64
.885
.833
1
1.0000
1-5/8
1.325
1.575
1.876
1.796
63/64
1.012
.956
1-1/8
1.1250
1-13/16
1.812
1.756
2.093
2.002
1-7/64
1.139
1.079
1-1/4
1.2500
2
2.000
1.938
2.309
2.209
1-7/32
1.251
1.187
1-3/8
1.3750
2-3/16
2.188
2.119
2.526
2.416
1-11/32
1.378
1.460
1-1/2
1.5000
2-3/8
2.375
2.300
2.742
2.622
1-15/32
1.505
1.433
1-5/8
1.6250
2-9/16
2.562
2.481
2.959
2.828
1-19/32
1.632
1.556
1-3/4
1.7500
2-3/4
2.750
2.662
3.175
3.035
1-23/32
1.759
1.679
2
2.0000
3-1/8
3.125
3.025
3.608
3.449
1-31/32
2.013
1.925
2-1/4
2.2500
3-1/2
3.500
3.388
4.041
3.862
2-13/64
2.251
2.155
2-1/2
2.5000
3-7/8
3.875
3.750
4.474
4.275
2-29/64
2.505
2.401
2-3/4
2.7500
4-1/4
4.250
4.112
4.907
4.688
2-45/64
2.759
2.647
3
3.0000
4-5/8
4.625
4.475
5.340
5.102
2-61/64
3.013
2.893
3-1/4
3.2500
5
5.000
4.838
5.774
5.515
3-3/16
3.252
3.124
3-1/2
3.5000
5-3/8
5.375
5.200
6.207
5.928
3-7/16
3.506
3.370
3-3/4
3.7500
5-3/4
5.750
5.562
6.640
6.341
3-11/16
3.670
3.616
4
4.0000
6-1/8
6.125
5.925
7.073
6.755
3-15/16
4.014
3.862

Copper Nickel Hex Nuts Dimension

Nominal Size or Basic Major Thread Diameter
F
G
H
Width
Across Flats
Width
Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
1/4
.2500
7/16
.438
.428
.505
.488
7/32
.226
.212
5/16
.3125
1/2
.500
.489
.577
.557
17/64
.273
.258
3/8
.3750
9/16
.562
.551
.650
.628
21/64
.337
.479
7/16
.4375
11/16
.688
.675
.794
.768
3/8
.385
.365
1/2
.5000
3/4
.750
.736
.866
.840
7/16
.448
.427
9/16
.5625
7/8
.875
.861
1.010
.982
31/64
.496
.473
5/8
.6250
15/16
.938
.922
1.083
1.051
35/64
.559
.535
3/4
.7500
1-1/8
1.125
1.088
1.299
1.240
41/64
.665
.617
7/8
.8750
1-5/16
1.312
1.269
1.516
1.447
3/4
.776
.724
1
1.0000
1-1/2
1.500
1.450
1.732
1.653
55/64
.887
.831
1-1/8
1.1250
1-11/16
1.688
1.631
1.949
1.859
31/32
.999
.939
1-3/8
1.3750
2-1/16
2.062
1.994
2.382
2.273
1-11/64
1.206
1.138
1-1/2
1.500
2-1/4
2.250
2.175
2.598
2.480
1-9/32
1.ASTM B151 GR. 8
1.245
1-5/8
1.6250
2-7/16
2.438
2.356
2.815
2.686
1-25/64
1.429
1.353
1-3/4
1.7500
2-5/8
2.625
2.538
3.031
2.893
1-1/2
1.540
1.460
2
2.0000
3
3.000
2.900
3.464
3.306
1-23/32
1.763
1.675
2-1/4
2.2500
3-3/8
3.375
3.263
3.897
3.719
1-15/16
1.986
1.890
2-1/2
2.5000
3-3/4
3.750
3.625
4.330
4.133
2-5/32
2.209
2.105
2-3/4
2.7500
4-1/8
4.125
3.988
4.763
4.546
2-3/8
2.431
2.319

Various Types of Copper Nickel Fasteners

Copper Nickel 90/10 Washers

Copper Nickel Washers

Copper Nickel 90/10 Screws

Copper Nickel Screws

Copper Nickel 90/10 Stud Bolts

Copper Nickel Stud Bolts

Copper Nickel 90/10 Rivet

Copper Nickel Rivet

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Countries We Export To

Finland, Denmark, South Korea, Czech Republic, Jordan, Sri Lanka, Belarus, Zimbabwe, Belgium, Trinidad & Tobago, Chile, United Kingdom, Italy, Macau, Bhutan, Bangladesh, Mexico, Turkey, Bahrain, Brazil, Iran, Poland, Puerto Rico, Lithuania, Vietnam, Germany, Malaysia, Gabon, Romania, Slovakia, Afghanistan, Hong Kong, Yemen, Egypt, Australia, Nepal, Japan, Kenya, Venezuela, Lebanon, Colombia, Nigeria, Singapore, Algeria, Azerbaijan, Taiwan, Morocco, Norway, Canada, Chile, Estonia, Angola, Peru, Austria, Netherlands, Kuwait, Indonesia, Russia, Nigeria, Ecuador, Iraq, Tibet, Tunisia, Iran, Israel, South Africa, Argentina, Switzerland, Poland, Hungary, Bolivia, Gambia, India, Bulgaria, Ukraine, New Zealand, Spain, Costa Rica, Croatia, Thailand, Ireland, Sweden, United Arab Emirates, Oman, Saudi Arabia, China, United States, Pakistan, Namibia, Ghana, Kazakhstan, Mongolia, Portugal, Qatar, Libya, Serbia, France, Philippines, Mexico, Greece.

Cities We Supply

Abu Dhabi, Ho Chi Minh City, Chandigarh, Atyrau, Ankara, Vung Tau, Ulsan, Geoje-si, Chennai, Santiago, Bengaluru, Ranchi, Dammam, London, Rio de Janeiro, Moscow, Aberdeen, Madrid, Hong Kong, Singapore, Al Jubail, Gimhae-si, Thane, Riyadh, Kuala Lumpur, Dubai, Cairo, Bogota, Baroda, Jakarta, Port-of-Spain, Kolkata, Los Angeles, Courbevoie, Petaling Jaya, Howrah, Kuwait City, Algiers, Ernakulam, Manama, Mumbai, Al Khobar, Hanoi, Lagos, Busan, Ludhiana, Tehran, Secunderabad, Perth, Visakhapatnam, Jaipur, Caracas, Nashik, Vadodara, Jamshedpur, Surat, La Victoria, Dallas, Jeddah, Indore, Brisbane, Istanbul, Gurgaon, Seoul, Faridabad, Nagpur, Montreal, Thiruvananthapuram, New York, New Delhi, Colombo, Pune, Sharjah, Calgary, Sydney, Ahvaz, Navi Mumbai, Kanpur, Haryana, Noida, Toronto, Bhopal, Houston, Coimbatore, Lahore, Rajkot, Milan, Chiyoda, Bangkok, Muscat, Doha, Hyderabad, Edmonton, Melbourne, Karachi, Pimpri-Chinchwad, Mexico City, Granada, Ahmedabad.