These fittings are made to tighter tolerances than other stainless steel pipe fittings. They are also known as instrumentation fittings.

Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. Use in applications up to 140 psi.

For installation in instrument panels, these valves have threads and a hex nut below the handle. They’re for use with water, oil, air, and inert gas.