Mini Cart 0

Your cart is empty.

About & FAQs

Couplings Company, Inc. is a leading supplier of quality brass-fittings. We have been in business for over 77 years (est. 1946). Today we warehouse over 8000 items, and we provide fittings for valued customers in all 50 United States, Europe and the Pacific Rim.   Our 50,000 square foot facility is strategically located just outside Chicago, in Lincolnshire, IL. It is from here that we are able to process orders at considerably lower freight costs for our customers. It also enhances our delivery times to both coasts.

Our primary lines include: Brass flare, compression, pipe, garden and barb fittings. We also carry fittings in plastic, stainless and cast brass; as well as valves, and copper & plastic tubing.  
We firmly believe that our greatest asset is our people. They’re not only knowledgeable; they also genuinely care about delivering an exceptional customer experience.   


Brass is one of the most common materials used for making fittings. Brass as a construction material is an alloy (primarily) of copper and zinc. Brass fittings are in high demand because of some inherent properties which make them superior than other materials. Brass fittings are for carrying water, gases, chemicals, fire sprinkler systems, etc. Fittings made of brass are available in a wide variety of shapes and thread sizes to connect, control any air or liquid flow in a pipe or tube.

Brass fittings are used in industrial, automotive, and truck applications because they are strong and durable. The advantages of brass for fittings include its good corrosive resistance, and also its plating, joining, polishing and finishing characteristics. Brass as a material is easily machined and so can be given any shapes of the various types of fittings available.

  • Relative Softness of Metal Provides for a Tight Seal and Ease of Installation.
  • Brass provides a more solid platform (vs. plastics) to facilitate the flow of air and liquids.
  • Brass fittings have excellent high temperature ductility and a reasonable cold ductility.

Here are just a few reasons how Couplings Company sets itself apart from the competition:

  • Price! Quality fittings at attractive pricing
  • Service! We ship orders placed by 12:00 noon CST the same day!  With over 8000 fittings in stock – Couplings Company is your single source for all your brass fitting needs. We have been in the brass fittings business for over 70 years – so we’ll be here when you need us!
  • Custom Specs! We can also manufacture custom brass fittings to your specs and prints!
  • No standard box quantities! Orders are filled to your requirements!  No need for change over – orders accepted in competitive part numbers, and shipped showing both competitive and our part numbers on the packing slip, invoice and box.
  • Experience! We offer our experience and expertise to our customers to help them meet their needs.
  • Brass fittings in CA360 Extrusions, CA377 Forgings & C693 ‘Lead Free’. We also carry Nylon & Stainless fittings, as well as valves and copper / plastic tubing.
  • Compliancy: Our CA360 Extrusions and CA377 Forgings are EPA, RoHS2, EC1935, H.R. 4173 and REACH compliant. In addition, our C693 ‘Lead Free’ is U. S. Bill S. 3874 compliant.

We primarily serve:

  • Industrial
  • Plumbing
  • Truck
  • Automotive