Overview
A coupling joins two pipe ends in a straight line. In brass it is one of the simplest and most-used fittings, and its quality comes down to thread accuracy, wall thickness and concentricity.
Empire Alloys turns couplings from in-house extruded hex and round brass bar, so wall thickness is consistent and threads run true. For a longer guide to choosing couplings, read our article on brass couplings in piping and fluid systems.
Types and variants we make
Full couplings
Female thread both ends.
Half couplings
For welding or brazing to vessels.
Reducing couplings
Join two sizes.
Hex couplings
Hex body for spanner grip.
Specifications
| Material | Brass (free-cutting / forging brass) or specified grade |
|---|---|
| Threads | BSP, BSPT, NPT, metric, UNC, UNF or custom |
| Typical size range | 1/8" to 4" (confirm per item) |
| Finish | Natural, nickel, chrome or as required |
| Process | Hot forging / bar machining, CNC turning, threading, inspection |
Values shown are typical capabilities. Final dimensions, threads, tolerances and finish are confirmed against your drawing or sample at quotation stage.
Why buyers specify these parts from Empire Alloys
- Extruded hex and round bar from own press
- Concentric threads
- Large-volume production
- Export supply
Applications
- Plumbing
- Pneumatic lines
- Hydraulic systems
- Gas pipelines
- Industrial equipment
Materials, plating and packing
Free-cutting brass (CZ121 / IS 319 type) is the default for machined parts; copper, copper alloys, aluminium, gunmetal and steel are also processed in-house. Plating options at Empire Alloys include tin, copper, chrome, nickel and zinc, with shot blasting and nitric wash available as surface treatments.
Parts are packed to suit the shipment: PVC or thermal PVC bags, cartons, shrink-wrap, strapped wooden cases or pallets, with every bag and carton labelled for easy identification.
What to send with your enquiry
- Drawing (PDF/DWG/STEP) or a physical sample, plus the part name or code you use
- Material grade and any standard the part must meet
- Thread type and size, critical dimensions and tolerance
- Finish or plating, quantity per lot and annual requirement
- Packing preference and delivery location (India or export)
Frequently asked questions
Do you make reducing couplings?
Yes.
What finishes are available?
Natural, nickel or chrome.
Can you supply in export packing?
Yes, in cartons, wooden cases or on pallets.
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