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Duplex Steel Nuts Supplier

Duplex Stainless Steel is used in numerous applications where corrosion resistance is necessary, nuts are frequently used in the chemical processing and oil & gas industries, and these sorts of fasteners are in high demand. Both their yield strength and corrosion resistance are good. Duplex Steel Nuts are also appropriate for usage in a marine environment. They are produced in a range of sizes and forms, which gives them a lot of versatility. Pump shafts, pipelines, pressure vessel tanks, and seawater equipment are some examples of typical applications. 

What is Duplex Steel?

Duplex steel is a stainless steel material. The combined microstructure gives the name ” duplex ” because it contains approximately appropriate portions of ferrite and austenite. This grade is the best-known variety, and this two-phase material significantly improves yield strength and corrosion resistance. Duplex stainless steels are approximately twice as strong as conventional austenitic or ferritic stainless steels. In addition, the Duplex steels have higher chromium content, 20-28%; higher molybdenum, up to 5%; lower nickel, up to 9% and 0.05-0.50% nitrogen.

Characteristics of Duplex Steel Nuts:

Duplex Steel Nuts are characterized by their high yield strength, twice the annealed yield strength of typical austenitic stainless steels. These nuts have enhanced tensile strength and yielding strength. These nuts are durable and can bear heavy haulage.

It has impressive resistance to environmental corrosion, general corrosion & cracking, and pitting resistance. These nuts are prone to stress-corrosion cracking, crevice corrosion, erosion, and general corrosion, because of which Duplex steel nuts are regularly utilized in many industries.

Uses of Duplex Steel Nuts:

The improved corrosion resistance of these nuts is suitable for applications like the power, marine, and seawater industries. They are used in a wide range of equipment like flow lines and manifolds and pumps of oil and gas processing plants, pressure vessels and heat exchangers, agitators, distillation columns, and condensers of the chemical processing industry. They are also used in desalination plants and wastewater treatments. These nuts are used in biogas tanks. They are also used in the pharmaceutical, petrochemical, paper, and pulp industries.

Specification For DSS Nuts

Specification ASTM A479, A182 / ASME SA479, SA182
Size Cold Forming process: M2-M24 Hot Forging process: M24-M100, 1-1/2” Dia, up to 1100mm lg CNC Machining for M100 / 4” Dia, up to 1500mm lg Manufacturing M2, M3, M3.5, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M42, M45, M48 to M160 and Custom Metric Stainless Steel Hex Nuts
Nuts Size Metric Dia: M10 – M110 / Length: 12 – 1200MM
Nuts Size Inch Dia: 1/2″ – 4.0″ / Length: 1/2″ – 52″
Length 3 to 200 mm
Standard ISO, IS, ANSI, ASME, UNI, ASTM, DIN, JIS, IS, GB, BS, CSN, EU, IFI, PN, and all International Standards
DIN Standard DIN 934, DIN 982, DIN 985, DIN 936, DIN 929, DIN 1587, DIN 439, DIN 315
Threads METRIC, BSW, UNC, UNF, BSF or as required
Nuts Forming Hot Forged Nuts & Cold Forged Nuts
UTS – Unified Thread Standard UNC, UNF, NPT, UNS, UNEF, NPTF
ASME Standard ASME B18.2.2 / ASME B18.16.6 /ASME B18.16.4 / ASME B18.2.2
Stainless Steel 304 Nuts

Size Chart of Duplex Stainless Steel Duplex Steel 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 DSS 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

Duplex Steel 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 A194 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 Duplex Steel Nuts

Hex Nuts

Duplex Steel Hex Nuts

  • Duplex Steel Hex Nuts 
  • DSS Hex Nuts 
  • Duplex Steel Heavy Hex Nuts
  • Duplex Stainless Steel Heavy Hex Nuts
  • Duplex Stainless Steel Hex Nuts 
  • Duplex Steel Heavy Hex Nuts 
  • DSS Heavy Hex Nuts 
  • ASTM A479 Duplex Steel Hex Nuts
  • Duplex Steel Heavy Hex Nuts 
  • Duplex Steel Hex Nut
  • ASME SA479 Duplex Steel Heavy Hex Nuts
Square Nuts

Duplex Steel Square Nuts

  • ASTM A182 Duplex Steel Square Nuts
  • DSS Square Nuts 
  • Duplex Steel Square Nuts 
  • Duplex Stainless Steel Square Nuts 
  • Duplex Steel Square Nuts
  • ASME SA182 Duplex Square Nuts 
  • Duplex Stainless Steel Square Nuts
  • DSS Square Nuts 
  • DSS Square Nut 
  • Duplex Steel Square Nuts 
  • DSS Square Nuts 
  • Duplex Stainless Steel Square Nuts
Wing Nuts

Duplex Steel Wing Nuts

  • Duplex Steel Wing Nuts 
  • DSS Wing Nut 
  • Duplex Steel Wing Nuts
  • Duplex Steel Wing Nuts
  • Duplex Steel Wing Nuts
  • Duplex Wing Nuts
Coupling Nuts

Duplex Steel Coupling Nuts

Acorn Nuts

Duplex Steel Acorn Nuts

Flange Nuts

Duplex Steel Flange Nuts

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Ready Stock Of Duplex Steel Nuts

  • Duplex Steel Nuts
  • Duplex Steel Pin-Lock nuts
  • DSS Acorn Nuts 
  • DSS Nuts 
  • Duplex Steel Nuts 
  • DSS Extra Tall Cap Nuts
  • Duplex Steel Nuts Dimensions
  • Duplex Steel Hex Nuts
  • Duplex Steel Nyloc Nuts 
  • Duplex Steel Nuts
  • DSS Nuts 
  • Duplex Steel Tee Nuts
  • Duplex Steel Shear Nuts
  • Duplex Steel Nuts 
  • DSS Self Clinch Nut
  • Duplex Steel Square Weld Nut
  • Type of Duplex Steel Nuts 
  • Duplex Steel Insert Nuts
  • Duplex Steel Slotted Nuts
  • DSS Nuts 
  • Duplex Stainless Steel Nuts
  • Duplex Steel K-Lock nuts 
  • Duplex Stainless Steel Panel Nuts 
  • Large Range of Duplex Steel Nuts Grade
  • Check Duplex Steel Nuts Sizes
  • DSS Half Hex Insert Nuts
  • Duplex Steel Metric Hex Nuts 
  • Duplex Steel Closed End Rivet Nuts
  • Duplex Steel Nuts 
  • DSS Castle Nuts 
  • DSS Nuts 
  • DSS Eye Nuts 
  • Duplex Hex Lock Nuts 
  • Duplex Steel Industrial Nuts Application
  • Grade Metric Duplex Steel Nuts
  • Duplex Steel Dome Nuts Grades Chart Pdf
  • Duplex Stainless Steel Panel Nuts
  • Duplex Steel Nylon Insert Nuts Standard
  • Duplex Steel Serrated Flange Nuts
  • Duplex Jam Nuts 
  • Duplex Steel Machine Screw Nuts Weight Chart
  • Duplex Steel Reducing Coupling Nut
  • Duplex Steel Nuts Duplex Steel Nylock Nuts
Oil and Gas Industry
Power Generation Industry
Chemical Industry
Food Processing Industry

We Serve Application Industry

Countries We Export To

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