This Legris 3175 inline connector is a nickel-plated brass push-to-connect fitting that connects a tube to a female threaded connection in a straight run. It has a push-to-connect tube connection on one end and male National Pipe Taper (NPT) threads on the other end for connecting to female threaded pipes. The NPT threads create a tighter seal than straight threads. This fitting's nickel plating is corrosion resistant, ferromagnetic, maintains much of its strength at high temperatures, and stays tough and ductile at low temperatures. This inline connector is suitable for use in air, water, oil, chemical, and food applications.

Tube fittings are components used for connecting, branching, terminating, and changing the direction of tubing in pneumatic and hydraulic systems. They are made of brass, stainless steel, PBT (polybutylene terephthalate), and other materials that resist corrosion and wear. Tube fittings have various types of connections, including threaded, welded, barbed, and push-to-connect (also called one-touch). Push-to-connect connections do not require tools or sealants. Tube fittings are used in various applications, including machine tools, airplane and truck controls, and automated production lines, among others.

Parker Hannifin manufactures electromechanical, hydraulic, and pneumatic motion technologies and systems for fluid handling, filtration, sealing and shielding, climate control, process control, and aerospace applications. The company, founded in 1918, is headquartered in Cleveland, OH.