Chicago Universal Air Hose CouplingUniversal Hose couplings, also known as “Chicago Couplings” or “Air King” series, are offer a simple quarter turn to connect. These couplings are commonly installed on hose assemblies that connect pneumatic tools to their compressed air source. Firmly pressing one coupler to another and twisting seals the connection. Safety clips prevent accidental disconnection during use. Universal couplings are a convenient quick connect system to mate varying diameters of hose as all sizes up to 1 inch interchange with one another. Sizes over 1 inch have a four lug design which also interchange with any hose size in the 4 lug style.  Universal couplings do not interchange with sandblast, Minsup, or European style couplings of similar design.  Lubricate the gasket for easier connection.

The pressure rating for all Chicago couplings is 150 PSI, all are rated for compressed air or water service only. 

Do not use for steam service!  

  • Available in Malleable Iron, Brass, and 316 Stainless Steel (316SS through 1 inch size)
  • Thread Type is NPT (Female thread only on 1-1/4 – 2 inch sizes)
  • Also available with swivel – Malleable Iron Only
  • Sizes from 1/4″ through 2″
Universal Chicago hose Couplings
Stainless Steel Universal Hose CouplingStainless steel universal couplings are available through 1 inch diameter (2-Lug sizes)
Brass Chicago hose coupling
Brass universal couplings (not lead-free) are available in all sizes
Always use Hose Safety Whip Checks on air hose assemblies


  • WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Do not use in connection with drinking water. Wash hands after handling.
  • Per Section 1417 of the Safe Drinking Water Act (SDWA) use Lead free parts in all consumable water applications.  Lead free refers to the wetted surface of pipes, fittings and fixtures in potable water systems that have a weighted average lead content = 0.25%. Source: California Health & Safety Code (116875). Vermont Act 193*171NLF
    Please contact us for a limited assortment of lead-free products