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Duplex Fasteners

Why Malaysia and Netherland Mostly Buy Duplex Bolts and Nuts From India?



Factor Why Buy Duplex Bolts and Nuts from India?
High Quality Raw Material European Sourced Raw Material
Customization Options Custom Sizes & Specification
Good Service Use Modern Technology (CNC Lathe)
Good Price Offers Save up to 10% To 12%.
Trustworthy Supplier IBR & ISO Certified
Bulk Order Discounts Up to 15%
Customer Support Expert Support Team (24 X 7)
Delivery Time Middle East (5 To 10 Day), Europe (15 To 60 Day), Africa (20 To 60 Day)

Supplier of Duplex Bolts in Mumbai According to the European Standards


Rimco Overseas is a duplex fasteners manufacturer in India. We can produce duplex bolts and nuts up to M100 for oil and gas and marine application. These bolts are supplied as per ASME B18.2.1 standards. Duplex stainless steel bolts ideal for chloride and saltwater environments


Duplex Fasteners Specification



Size In Ready Stock

Size In Ready Stock

  • Threaded Rod = M4 To M45
  • Nut = M2 To M20
  • Bolts : M1.2 To M48
  • Screw : M1.2 To M48
Duplex Bolts

Duplex Bolts

  • Neck Type: Hex, Knurled, Square, Triangular
  • Head Type : Truss, Oval, Hex, Pan, Flat
  • Thread : UN, BSW, CBSF, UNF
Duplex Threaded Rod

Duplex Threaded Rod

  • Condition : Drawn & Cold Threading
  • Thread : Left and Right Hand
  • Finish : Brushed, Polished, Mill
Duplex Steel Studs

Duplex Steel Studs

  • Threads : Double End, Fully & Fine Threaded
  • Process : Hot and Cold Forging
  • End : Saw Cut, Rounded, Flat
Duplex Screw

Duplex Screw

  • Pitch Of Threads : Fine and Coarse
  • Shape Of Head : Button, Pan, Truss, Round
Duplex Washer

Duplex Washer

  • Forms : A, D, C, G, B, E
  • Wall Thickness (WT) : 0.002" to ½"
  • Inside Diameter (ID) : 0.062" to 12"
International Standard

International Standard

  • USA : ISO 4033 and ISO 4032
  • American : ASME B18 2.2 and ASME B18 2.1
  • Germany : DIN 931, DIN 933, DIN 970
  • Australia : UNEF, UNF, UNC, NPT, UNS
Manufacturing Process

Manufacturing Process

  • Hot forging
  • Cold forging
  • CNC Machined
Advantage

Advantage

  • High Yield Strength
  • Improved Corrosion Protection
  • Low Thermal Expansion
Testing & Inspection

Testing & Inspection

  • Ferritiscope Test
  • PMI Test
  • Hardness Test
Available Packaging

Available Packaging

  • Wooden Pallet
  • Carton Box
  • Wooden Cases
Surface

Surface

  • Polished Finish
  • Brushed Finish
  • Mill Finish
Use

Use

  • Marine Environments
  • Chemical Processing
  • Transport & Storage
  • Pulp & Paper Digesters
Testing Certificates

Testing Certificates

  • EN 10204/3.1B
  • Raw Materials Certificate
  • Third Party Inspection
  • 100% Radiography Test Report
Value Added Services

Value Added Services

  • Bagging
  • Thread Locking
  • Head Shank Drilling
  • Head Painting
Delivery Time

Delivery Time

  • Denmark = 35 Day
  • Belgium = 40 Day
  • UAE = 5 Day
  • Saudi Arabia = 7 Day

DIN Standard For Duplex Steel Bolts



DIN Standard Types
DIN 529 A Anchor Bolts
DIN 444 Eye Bolts
DIN 478 Square Head Bolts with collar
DIN 609 Hex fits bolts with long thread
DIN 3570 U-bolts
DIN 11014 Plough Bolts
DIN 22424 A Triangle head bolts
DIN 186 Square Neck Head
DIN 580 Lifting Eye Bolts
DIN 601 Hex bolts with nut
DIN 607 Half Coach Bolt
DIN 188 Double Nip
DIN 261 T-head bolts

BS Standard For Duplex Nuts



BS Standard Types
BS 1083 Hexagon Lock Nuts
BS 4190 Hex Nuts
BS 916 Hex Lock Nuts with B.S.Threads
BS 3692 Hex Thin Nuts
BS 450 Machine Nuts
BS 325 Countersunk nuts

What Factors Affect The Price Of Duplex Stainless Steel Bolts?



What Factors Affect The Price Of Duplex Stainless Steel Bolts

Duplex Bolt Torque



Nominal Diameter Threads Torque ft-lb Torque ft-lb
Inches Inches Lubricated Dry
1/4" 20 To 28 4.8-5.5 6.5-7.4
5/16" 18 To 24 10.0-11.0 13.2-14.7
3/8" 16 To 24 17.7-19.9 23.5-26.6
7/16" 14 To 20 28.2-31.5 37.6-42.0
1/2" 13 To 20 43.0-48.5 57.4-64.7
9/16" 12 To 18 62.1-69.2 82.7-92.3
5/8" 11 To 18 85.7-97.0 114.2-129.3
3/4" 10 To 16 152-170 203-226
7/8" 9 To 14 245-270 326-361
1" 8 To 14 368-412 490-549
1-1/4" 7 To 12 639-708 853-944
1-1/2" 6 To 12 1112-1252 1484-1669

Delivery Schedules Of Duplex Stud Bolts



Ultrapar
  • M12 (Full Threaded Studs)
  • Ultrapar
  • São Paulo, Brazil
  • 45-60 Day
MEG Energy
  • M16 (Double End Studs)
  • MEG Energy
  • Calgary, Alberta, Canada
  • 45 Day
Chesapeake Energy
  • M20 (Tap End Studs)
  • Chesapeake Energy
  • Oklahoma, USA
  • 40-60 Day
Harbour Energy
  • M10 (Weld Studs)
  • Harbour Energy
  • London, UK
  • 30 Day
CPC Corporation
  • M8 (Weld Studs)
  • CPC Corporation
  • Kaohsiung City, Taiwan
  • 15 Day
Petrovietnam
  • M6 (Full Threaded Studs)
  • Petrovietnam
  • Hanoi, Vietnam
  • 10 Day

Material Benefits of Duplex Fasteners



  • High Strength
  • Excellent Corrosion Resistance
  • Low Thermal Expansion
  • Extremely Strong
  • High Yield Strength

Can Duplex Screws Be Custom Manufactured for Specific Sizes?



Yes, duplex steel screws can be custom manufactured to specific sizes. Normally these screws come with M2, M3, M4, M5, M6, M8 and larger.

DSS Fasteners Tensile Properties at Elevated Temperatures



Temperatures Tensile Strength
122ºF 96 ksi
212ºF 90 ksi
392ºF 83 ksi
572ºF 81 ksi

Hardness For Duplex Stainless Steel Nuts



  • Brinell = 290 HB (maximum)

Purchase Duplex Screws With Polished Surface, and View Temperature Limit


Duplex screws stock upto 3/6" to 2" or Custom Sizes, We are duplex fasteners manufacturer in India as per ASTM A479 or ASME SA479. The chemical elements of duplex stainless steel fasteners includes chromium 20% to 28%, molybdenum (up to 5%), nickel (up to 5%) and nitrogen (0.05% to 0.5%).


Temperature Limit Of Duplex Threaded Rod



  • 299°C (570°F)

Buy Corrosion Resistance Duplex Stainless Steel Nuts for Marine Environments at 300°C


Leading duplex fasteners manufacturer In India. We are known for larger stocking capabilities. Duplex nuts are not ideal for harsh chemical environments.


Corrosion Resistance Of Duplex Hex Bolt



Nitric Acid

  • Good

Phosphoric Acid

  • Moderate

Sour Gas

  • Moderate

Salt Spray

  • Excellent

Acetic Acid

  • Good

Sulfuric Acid

  • Moderate

Humidity

  • Excellent

Sea Water

  • Moderate

Sodium Hydroxide

  • Moderate

Duplex Stainless Steel Screws Heat Treatment



  • 1020°C to 1100°C (Cool Quickly)

Applications Of Duplex Stainless Steel Fasteners



Applications Of Duplex Stainless Steel Fasteners

Check Duplex SS Washers Suitable Environment and DSS Hex Bolt Threads Pitch Options

Rimco Overseas is one of the top duplex fasteners manufacturer in India. Our products are known for excellent quality and finishes. They have high strength and low thermal expansion.


Suitable Environment of Duplex Bolt Material



  • Chloride environments
  • Marine environments
  • Brackish Water
  • Salt Air

Stockist of Duplex Threaded Rod Perform Hydrostatic Testing Before Dispatch in Middle East & Africa

Which Test Should Be Performed Before Installing Duplex Washers?



Pressure Test

Pressure Test

Corrosion Test

Corrosion Test

Chemical Analysis

Chemical Analysis


What Are The Thread Pitch Options For Duplex Stainless Studs?



  • Metric coarse (M)
  • Unified Coarse (UNC)
  • Unified Fine (UNF)

Duplex Steel Studs Better Than Stainless Steel?



Yes, duplex studs provide two time better mechanical strength compared to stainless steel.


Types Of Duplex Bolts



Duplex Hex Bolts

Duplex Hex Bolts

Duplex Stainless Steel Heavy Hex Bolts

Duplex Stainless Steel Heavy Hex Bolts

Duplex Steel Eye Bolts

Duplex Steel Eye Bolts

Duplex Stainless U Bolts

Duplex Stainless U Bolts

Stainless Steel Duplex Carriage Bolts

Stainless Steel Duplex Carriage Bolts

Duplex Flange Bolts

Duplex Flange Bolts


Types Of Duplex Stainless Steel Nuts



DSS Hex Nuts

DSS Hex Nuts

Duplex SS Heavy Hex Nuts

Duplex SS Heavy Hex Nuts

 Duplex Square Nuts

Duplex Square Nuts

Duplex Stainless Steel Jam Nuts

Duplex Stainless Steel Jam Nuts

Duplex Steel Wing Nuts

Duplex Steel Wing Nuts

Duplex Stainless Nylock Nuts

Duplex Stainless Nylock Nuts


Types Of Duplex Steel Screw



Stainless Steel Duplex Hex Cap Screws

Stainless Steel Duplex Hex Cap Screws

Duplex Socket Cap Screws

Duplex Socket Cap Screws

DSS Button Head Screws

DSS Button Head Screws

Duplex SS Mushroom Head Screws

Duplex SS Mushroom Head Screws

Duplex Wood Screws

Duplex Wood Screws

Duplex Stainless Steel Self Drilling Screws

Duplex Stainless Steel Self Drilling Screws


Types Of DSS Stud Bolts



Duplex Steel Threaded Studs

Duplex Steel Threaded Studs

Duplex Stainless Tap End Studs

Duplex Stainless Tap End Studs

Stainless Steel Duplex Double End Studs

Stainless Steel Duplex Double End Studs

Duplex Threaded Rod

Duplex Threaded Rod

DSS Flange Bolting Stud Bolts

DSS Flange Bolting Stud Bolts

Duplex SS Weld Studs

Duplex SS Weld Studs


Type Of Duplex Washer



Duplex Flat Washer

Duplex Flat Washer

 Duplex Stainless Steel Spring Lock Washer

Duplex Stainless Steel Spring Lock Washer

Duplex Steel Square Washer

Duplex Steel Square Washer

 Duplex Stainless Ogee Washers

Duplex Stainless Ogee Washers

Stainless Steel Duplex Self Locking Washer

Stainless Steel Duplex Self Locking Washer

Duplex Fender Washers

Duplex Fender Washers



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