Chicago / Universal Air Coupling

The Chicago Universal Air Coupling, also known as a “Chicago fitting” or “crowfoot coupling,” is a type of hose fitting designed for quick and secure connections in air and water systems. It features a unique claw-style head that allows two identical couplings to be joined with a simple twist, creating a tight, leak-proof seal. Made from brass or other durable materials, these couplings are commonly used in industrial, construction, and oilfield environments for their ease of use, reliability, and ability to withstand high pressure. They are especially popular for pneumatic tools and compressed air systems.