Recognized by the extremely short pilot. Has the widest metal section between the ball groove and the pilot. The sealing surface on the end of the nipple is wider than other interchanges, resulting in better sealing and longer seal life. Intended for compressed air lines only. 300 PSI maximum rated working pressure. 1/4 in. female NPT tru-flate design plugT-style - extremely short pilotWide metal section between ball groove and pilotWide nipple end sealing surfaceMaximum rated working pressure of 300 PSI