Duplex Fasteners

Best Quality Leading DSS Bolt & Nuts Manufacturer in India

Duplex Steel Fasteners

Duplex Stainless Steel Fasteners

Duplex Stainless Fasteners
Why should buyers choose KM Steel India Duplex Bolts to prevent corrosion?
Duplex bolts offer resistance to:
- Saltwater
- pitting and crevice corrosion
- Sulfide stress corrosion resistance
- Oxidation
Table of Content
- Duplex Fasteners Specifications
- Types of Duplex Fasteners
- Tensile Properties of Duplex Stainless Steel Fasteners
- DIN Standard For Duplex Steel Bolt and Nuts
- Dimensions chart of Stainless Steel Duplex Flange Bolt
- Weight Chart Of DSS Bolt
- Temperature Range for Duplex Stainless Steel Screws
- Duplex SS Fasteners Dimension Chart
- DSS Heavy Hex Bolts Torque Chart
- Hardness Chart of Duplex Scews
- Can High-Temperature Applications Use Duplex Fasteners?
- Benefits of Duplex Fasteners
- Corrosion Resistance Of Duplex Nuts
- Available Grades of Duplex Stainless Steel Fasteners
- Applications of SA 276 Duplex Socket Head Cap Screw
- Duplex Alloy Threaded Rod Physical Properties
- Duplex Stainless Steel Rivets Mechanical Properties
- Equivalent Grades of Duplex Stainless Steel Hex Nuts
- Chemical Composition of Duplex SS Flange Bolts
- Check out Your Nearby Locations For Fastest Deliveries
- Why Japan and Korea Mostly Buy Duplex Bolts and Nuts From KM Steel India?
- Surface Coatings DSS Hex Bolt
- Delivery Timetable of Duplex SS Square Nut Suppliers
Supplier of Duplex SS Hex Bolt With Polished Surface, and View Specification

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Duplex Fasteners Specifications
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- Bolts : M1.2 To M48
- Screw : M1.2 To M48
- Threaded Rod : M4 To M45
- Nut : M2 To M20
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- UNC BSF
- BSW
- UNF
- METRIC
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- Rockwell / brinell hardness test
- Tensile test
- Charpy V-notch test
- Microstructure analysis
- Impact testing
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- Phosphating
- Oxidation
- Zinc impregnation
- DACROMET, HDG
- Electric galvanized
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- Saw cut
- Rounded
- Chamfer, Flat
- Sheared
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- High Yield Strength
- Improved Corrosion Protection
- Low Thermal Expansion
- High durability
- Easy installation
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- Threading
- Cold Drawn

- Fine Threads
- Coarse Threads
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- ASTM A276
- ASTM A479
- ASTM A182
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- Hot Forging
- Cold Forging
- CNC machined
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- Corrugated Box
- Carton
- Small Pack
- Pallet
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- Specification
- Material grade
- Heat number
- Custom logo
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- Flange joints
- Petrochemical plants
- Rigs
- Bridge construction
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- Oman, Saudi Arabia
- UAE, Abu Dhabi
- Algeria, South africa
- USA, Dubai
Types of Duplex Fasteners
Duplex Fasteners Supplier in India Offers a Variety of The Most Popular Types.
Duplex Steel Bolt in Stock

DSS Hex Head Bolt

Duplex Stainless Steel Flange Bolts

Duplex SS Square Head Bolts

ASTM A276 Duplex Steel Eye Bolts

Duplex SS Alloy J-Bolts

Duplex Steel Flange Bolts

Duplex Stainless Hanger Bolts

ASTM A276 Duplex Steel U-Bolts

SA 276 Duplex Shoulder Bolts
Duplex Stainless Steel Nuts in Stock

SA 276 Duplex Heavy Hex Nuts

Duplex Stainless Steel Hex Jam Nuts

Duplex SS Alloy Keps-K Lock Nuts

ASTM A276 Duplex Steel Castle Nuts

Duplex SS Cap Nuts

Duplex Stainless Steel Nuts
ASTM A276 Duplex Steel Screw in Stock

Duplex SS Hex Cap Screws

Duplex SS Socket Head Cap Screws

Duplex Stainless Button Head Screws

Duplex Stainless Steel Self Drilling Screws

SA 276 Duplex Machine Screws

Duplex SS Alloy Wood Screw
Duplex Stainless Steel Metal Stud Bolts in Stock

DSS Full Threaded Stud

Duplex Stainless Steel Tap End Stud

Duplex SS Double End Stud

ASTM A276 Duplex Steel Threaded Rod

SA 276 Duplex Bolting Stud Bolts

Duplex Steel Weld Studs
DSS Washers in Stock

Duplex Stainless Fender Washers

DSS Square Washers

Duplex Stainless Steel Flat Washers

SA 276 Duplex Hastelloy Spring Washers
Tensile Properties of Duplex Stainless Steel Fasteners
| Temperatures | 122ºF | 212ºF | 392ºF | 572ºF |
|---|---|---|---|---|
| Tensile Strength | 96 ksi | 90 ksi | 83 ksi | 81 ksi |
DIN Standard For Duplex Steel Bolt and Nuts
| DIN Standard | Types | DIN Standard | Types |
|---|---|---|---|
| DIN 529 A | Anchor Bolts | DIN 186 | Square Neck Head |
| DIN 444 | Eye Bolts | DIN 580 | Lifting Eye Bolts |
| DIN 478 | Square Head Bolts with collar | DIN 601 | Hex bolts with nut |
| DIN 609 | Hex fits bolts with long thread | DIN 607 | Half Coach Bolt |
| DIN 3570 | U-bolts | DIN 188 | Double Nip |
| DIN 11014 | Plough Bolts | DIN 261 | T-head bolts |
Dimensions chart of Stainless Steel Duplex Flange Bolt
| Bolt Size | USS | SAE | ||||
|---|---|---|---|---|---|---|
| Thickness | OD (in) | ID (in) | Thickness | OD (in) | ID (in) | |
| 1 | .136/.192 | 2.500 | 1.062 | .108/.160 | 2.000 | 1.062 |
| 1 1/8 | .136/.192 | 2.750 | 1.250 | .108/.160 | 2.250 | 1.250 |
| 1 1/4 | .136/.192 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 |
| 1 3/8 | .153/.213 | 3.250 | 1.500 | .136/.213 | 2.750 | 1.500 |
| 1/4 (#14) | .051/.080 | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 |
| 1/8 (#6) | – | – | – | .036/.065 | 0.375 | 0.156 |
| 3/4 | .122/.177 | 2.000 | 0.812 | .108/.160 | 1.469 | 0.812 |
| 3/16 (#10) | .036/.065 | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 |
| 5/32 (#8) | – | – | – | .036/.065 | 0.438 | 0.188 |
| 5/16 | .064/.104 | 0.875 | 0.375 | .051/.080 | 0.688 | 0.344 |
| 3/8 | .064/.104 | 1.000 | 0.438 | .051/.080 | 0.812 | 0.406 |
| 7/16 | .064/.104 | 1.250 | 0.500 | .051/.080 | 0.922 | 0.469 |
| 7/32 (#12) | – | – | – | .051/.080 | 0.562 | 0.250 |
| 9/16 | .086/.132 | 1.469 | 0.625 | .074/.121 | 1.156 | 0.594 |
| 5/8 | .108/.160 | 1.750 | 0.688 | .074/.121 | 1.312 | 0.656 |
| 7/8 | .136/.192 | 2.250 | 0.938 | .108/.160 | 1.750 | 0.938 |
DSS Heavy Hex Bolts is Used in Automotive industry, Aerospace & SA 276 Duplex Rivets, Check Weight Chart
Weight Chart Of DSS Bolt
Detailed DSS Bolt Weight Chart from Top Duplex Fasteners Manufacturers
| Bolt Size | USS | SAE | ||||
|---|---|---|---|---|---|---|
| Thickness | OD (in) | ID (in) | Thickness | OD (in) | ID (in) | |
| 1 | .136/.192 | 2.500 | 1.062 | .108/.160 | 2.000 | 1.062 |
| 1 1/8 | .136/.192 | 2.750 | 1.250 | .108/.160 | 2.250 | 1.250 |
| 1 1/4 | .136/.192 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 |
| 1 3/8 | .153/.213 | 3.250 | 1.500 | .136/.213 | 2.750 | 1.500 |
| 1/4 (#14) | .051/.080 | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 |
| 1/8 (#6) | – | – | – | .036/.065 | 0.375 | 0.156 |
| 3/4 | .122/.177 | 2.000 | 0.812 | .108/.160 | 1.469 | 0.812 |
| 3/16 (#10) | .036/.065 | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 |
| 5/32 (#8) | – | – | – | .036/.065 | 0.438 | 0.188 |
| 5/16 | .064/.104 | 0.875 | 0.375 | .051/.080 | 0.688 | 0.344 |
| 3/8 | .064/.104 | 1.000 | 0.438 | .051/.080 | 0.812 | 0.406 |
| 7/16 | .064/.104 | 1.250 | 0.500 | .051/.080 | 0.922 | 0.469 |
| 7/32 (#12) | – | – | – | .051/.080 | 0.562 | 0.250 |
| 9/16 | .086/.132 | 1.469 | 0.625 | .074/.121 | 1.156 | 0.594 |
| 5/8 | .108/.160 | 1.750 | 0.688 | .074/.121 | 1.312 | 0.656 |
| 7/8 | .136/.192 | 2.250 | 0.938 | .108/.160 | 1.750 | 0.938 |
Temperature Range for Duplex Stainless Steel Screws
299°C (570°F)
Exporter of Duplex SS Socket Head Cap Screw Perform Hydrostatic Testing, Refer Dimension Chart
Duplex SS Fasteners Dimension Chart
Duplex Fasteners Manufacturer in India offers a wide Range of Dimensions
| SIZE | M1.6 to M64 | M3 to M20 | M3 to M12 | M4 to M20 | M6 to M24 | M3 to M10 | M3 to M20 | M3 to M12 | M3 to M20 | M6 to M12 | M3 to M20 | M8 to M22 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GRADE | 12.9 | 12.9 | 12.9 | 10.9 | 12.9 | 12.9 | 45H | 45H | 45H | 45H | 45H | – |
| ASME | B18.3.1 M | B18.3.5M | B18.3.4M | B18.3.3M | B18.3.6M | B18.3.6M | B18.3.6M | B18.3.6M | B18.3.6M | |||
| ISO | 4762 | 10642 | 7380 | 4028 | 4027 | 4029 | 4026 | 4029 | ||||
| ASTM | A574M | F835M | F835M | F835M | F912M | F912M | F912M | F912M | F912M |
DSS Heavy Hex Bolts Torque Chart
Duplex Fasteners Supplier in India provides premium-grade fasteners with a Accurate Torque Values
| Diameter (inch) | 1/4″ | 5/16″ | 3/8″ | 7/16″ | 1/2″ | 9/16″ | 5/8″ | 3/4″ | 7/8″ | 1″ | 1-1/4″ | 1-1/2″ | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque ft-lb (Dry) | 6.5 | 7.4 | 13.2 | 14.7 | 23.5 | 26.6 | 37.6 | 42 | 57.4 | 64.7 | 82.7 | 92.3 | 114.2 | 129.3 | 203 | 226 | 326 | 361 | 490 | 549 | 853 | 944 | 1484 | 1669 |
| Torque ft-lb (Lubricated) | 4.8 | 5.5 | 10 | 11 | 17.7 | 19.9 | 28.2 | 31.5 | 43 | 48.5 | 62.1 | 69.2 | 85.7 | 97 | 152 | 170 | 245 | 270 | 368 | 412 | 639 | 708 | 639 | 1252 |
| Threads (inch) | 20 | 28 | 18 | 24 | 16 | 24 | 16 | 24 | 13 | 20 | 12 | 18 | 11 | 18 | 10 | 16 | 9 | 14 | 8 | 14 | 7 | 12 | 6 | 12 |
Hardness Chart of Duplex Scews
| Duplex Washers Type | Square Section Spring Washer | Hardened Washer | Flat Section Spring Washer | Hardened Steel Washer | |
|---|---|---|---|---|---|
| SIZE | 3mm to 39mm | 12mm to 30mm | 3mm to 39mm | 12mm to 56mm | |
| HARDNESS | HV (430 to 530) | HV (300 to 370) | HV (430 to 530) | Rockwell 26 to 45 (HDG) | Rockwell 38 to 45 (Coated) |
| STANDARD | DIN 7980 | IS 2016 | DIN 127 B | ASTM F436M | |
Can High-Temperature Applications Use Duplex Fasteners?
Yes, Duplex Fasteners Can Be Used in high-temperature Applications.
Benefits of Duplex Fasteners
Top Benefits of Duplex Bolts from Trusted Duplex Fasteners Manufacturers

Corrosion Resistance Of Duplex Nuts
| Nitric Acid | Sour Gas | Salt Spray | Humidity |
|---|---|---|---|
| Good | Moderate | Excellent | Excellent |
| Phosphoric Acid | Acetic Acid | Sulfuric Acid | Sea Water |
| Moderate | Good | Moderate | Moderate |
Available Grades of Duplex Stainless Steel Fasteners
| Grade |
|---|
| 2205 |
| 2507 |
Applications of SA 276 Duplex Socket Head Cap Screw

Duplex Alloy Threaded Rod Physical Properties
| Density lbm/in3 | Electrical Resistivity mW•in | Thermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
|---|---|---|---|---|---|
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572°F | 24.9 | 10.4 | 0.134 | 39.4 | |
| at 212°F | 26.1 | 9.2 | 0.119 | 35.4 |
Stainless Steel Duplex Washer Have High Tensile Strength, Check Mechanical Properties
Duplex Stainless Steel Rivets Mechanical Properties
Duplex Steel Bolt Manufacturer in India Offers Fasteners With Excellent Mechanical Properties
| Grade | Hardness | Elongation |
|---|---|---|
| Rockwell C (HR C) | (% in 50mm) | |
| UNS S31803 | 293 max. | 25 |
| UNS S32205 | 293 max. | 25 |
Equivalent Grades of Duplex Stainless Steel Hex Nuts
| STANDARD | STANDARD | Duplex 2205 |
|---|---|---|
| WERKSTOFF NR. | Russia | 1.4462 |
| UNS | North America | S31803 / S32205 |
Chemical Composition of Duplex SS Flange Bolt
| Grade | Mn max | S max | Mo | Cr | C max | P max | Si max | N | Ni |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | 2.0 | 0.02 | max 3.5 min 2.5 | max 23.0
min 21.0 |
0.03 | 0.03 | 1.0 | max 0.20
min 0.08 |
max 6.5
min 4.5 |
| S32205 | 2.0 | 0.02 | max 3.5 min 3.0 | max 23.0
min 22.0 |
0.03 | 0.03 | 1.0 | max 0.20
min 0.14 |
max 6.5
min 4.5 |
Check out Your Nearby Locations For Fastest Deliveries
Suplier of Duplex Fasteners, Supply DSS Bolt & Nuts in Various Countries
| Turkey | South Africa | Sudan |
|---|---|---|
| Australia | Kazakhstan | Israel |
| New Zealand | Saudi Arabia | Morocco |
| Sri Lanka | Iraq | Myanmar |
| Vietnam | Singapore | South Korea |
| Cambodia | Algeria | France |
| Colombia | Ukraine & Egypt | Gabon |
Why Japan and Korea Mostly Buy Duplex Bolts and Nuts From KM Steel India?

Surface Coatings DSS Hex Bolt
Duplex Bolts Surface Coatings Offered by Leading Duplex Fasteners Manufacturers
- Mirror Buffed, Hot Dipped Galvanizing
- Epoxy Coating, Electro Polished
- Passivation, Teflon Coating
- Oxidized, Zinc Plating
- Chrome Plating
Delivery Timetable of Duplex SS Square Nut Suppliers
| Country Name | Delivery Time |
|---|---|
| UAE/ Dubai | 5 days |
| Jordan | 21 days |
| South Africa | 25-30 days |
| Saudi Arabia | 7 days |
| Singapore | 8 days |
| Thailand | 7 days |
Why Choose KM Steel India ?
- ISO & PED Approved Manufacturer & Supplier for Fastening Products
- Importer and Exporter of Hex Bolts, Threaded Rod, Studs, Socket Head cap screws in Maharashtra.
- Top 5 Trader & Wholesaler of Set screws, Machine screws, Washers, Heavy Hex head bolt, Double Ended Studs in India, For Low and High Temperature Applications.
- Offer Inexpensive Rates to the local Distributor & Reseller Mexico, China, Brazil, Peru, Nigeria, Jordan, Dubai, Thailand (Bangkok), Venezuela, Iran, UK, Canada, and Russia.
- Stockist of Rivets, Hex Nuts, Lock Nuts, Bolts and Nuts Used in Various Industries and Applications For Fastening and Securing Purposes in Maharashtra.
