This Tru-Flate 12-135 coupler plug is suitable for connecting a hose or tool inlet to a coupler socket (not included). It is made of brass for resistance to corrosion and has a 1/4" female National Pipe Thread (NPT) threaded connection for connecting to a male hose fitting. This Tru-Flate (T-style) coupler plug has a wide metal section between the groove and the pilot for a tight seal and longer seal life, and it has a tubular valve that supports the seal and allows more air flow at lower pressure. It has a maximum working pressure of 300 pounds per square inch (psi). This coupler plug fitting requires a quick coupler of matching design and size and is suitable for use with compressed air lines.

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.

Plews & Edelmann manufactures automotive and pneumatic hose, lines, reels, accessories, fittings, and lubricants under the Edelmann, Amflo, Omega, LubriMatic, and UltraLube brands. The company, founded in 1909, is headquartered in Dixon, IL.