Forged Fittings

Threaded Full Coupling

ASME B16.11 · Standard and custom sizes · 1/8" NB to 4" NB

Threaded Full Coupling

Threaded Full Coupling in standard and custom sizes to ASME B16.11. Compare quotes from verified suppliers on MetalMitra, with MTC 3.1 and worldwide delivery.

  • Threaded Full Coupling
  • ASME B16.11
  • NPT
  • BSPT
  • Class 2000
  • Class 3000
  • Class 6000

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Specifications

TypeFull Coupling
StandardASME B16.11, MSS SP-83, MSS SP-95, BS 3799
Size1/8" NB to 4" NB
Pressure Class2000 LBS, 3000 LBS, 6000 LBS
ThreadsNPT (ASME B1.20.1), BSPT, BSPP (ISO 7 / ISO 228)
ManufacturingForged & Machined

Grades & standards

  • ASME B16.11

Need a dependable fitting? Threaded Full Coupling on MetalMitra comes in standard and custom sizes to ASME B16.11, ready for changes in direction, branching and size transitions.

Through MetalMitra you can source Threaded Full Coupling in stainless steel, carbon steel, alloy steel, duplex, nickel alloy and other grades, across a broad range of sizes and pressure ratings.

A threaded full coupling joins two male-threaded pipes of the same size.

Threaded (screwed) fittings are forged fittings with internal or external pipe threads, allowing small-bore piping to be assembled and dismantled without welding. They are used in utility, instrument, air, water and low-to-medium pressure process lines.

Available forms & variants

  • Elbows & Tees — 45°, 90° and street elbows, tees and crosses.
  • Couplings & Unions — Full, half and reducing couplings and unions.
  • Plugs & Bushings — Hex, square and round head plugs, hex bushings.
  • Nipples & Caps — Hex nipples, pipe nipples and caps.

Performance highlights

  • Pipe-to-Pipe — Joins two threaded pipes.
  • Simple — Easy to install.
  • No Welding Needed — Fast to assemble, simple to maintain.
  • Accurate Threads — Threads verified with ring and plug gauges.

Threaded Full Coupling Material & Grades

Material Grades / Specifications
Stainless Steel ASTM A182 / ASME SA182 F304, F304L, F304H, F310, F316, F316L, F316H, F316Ti, F321, F347, F904L
Duplex & Super Duplex ASTM A182 F51, F53, F55, F60
Carbon Steel ASTM A105, A350 LF2 / LF3, A694 F42 – F70
Alloy Steel ASTM A182 F1, F5, F9, F11, F12, F22, F91
Nickel Alloys ASTM B564 – Nickel 200, Monel 400, Inconel 600/625, Incoloy 800/825, Hastelloy C276, Alloy 20
Copper Nickel ASTM B151 – Cu-Ni 90/10 (C70600), Cu-Ni 70/30 (C71500)

Pressure Class vs Pipe Schedule

As per ASME B16.11, the pressure class of threaded fittings is matched to the wall thickness of the connecting pipe:

Fitting Class Matching Pipe Schedule
Class 2000 Schedule 80 / XS
Class 3000 Schedule 160
Class 6000 XXS

Typical applications

  • Utility & Air Lines
  • Water Treatment
  • Oil & Gas
  • Chemical Processing
  • Power Generation
  • Instrumentation
  • Hydraulics
  • Fertilizer Plants
  • Pharmaceutical
  • Food Processing
  • Fabrication
  • General Engineering

Quality checks & certification

Every lot of Threaded Full Coupling sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.

  • Dimensional inspection as per ASME B16.11
  • Thread gauge inspection (NPT / BSP)
  • Visual inspection
  • Positive Material Identification (PMI)
  • Hardness testing as applicable
  • EN 10204 3.1 Mill Test Certificate
  • Third-party inspection (TPI) on request

Why buy through MetalMitra

  • Checked sellers only — Every supplier profile is screened by MetalMitra before it goes live.
  • Faster sourcing — Post one requirement and receive competitive offers without chasing calls.
  • Paperwork sorted — MTC 3.1, test reports and TPI arranged as your project demands.
  • Global logistics — Seaworthy packing and dispatch to project sites across the world.

Ready to buy?

Send your size, grade, quantity and delivery location for Threaded Full Coupling, and matching suppliers on MetalMitra will come back with offers.

Technical note: Figures shown are indicative. Final acceptance should be based on the applicable standard, approved drawings and the MTC supplied with the material.

Applications & industries

  • Utility & Air Lines
  • Water Treatment
  • Oil & Gas
  • Chemical Processing
  • Power Generation
  • Instrumentation
  • Hydraulics
  • Fertilizer Plants
  • Pharmaceutical
  • Food Processing
  • Fabrication
  • General Engineering
  • Oil & Gas
  • Power Generation
  • Chemical Processing
  • Water & Wastewater
  • Pharmaceutical
  • Food & Dairy
  • Fertiliser

Testing & documents

Ask for the documents you need in your requirement — suppliers confirm them in their quotation:

  • Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
  • Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
  • Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests

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