FESTO 153421 PUSH-IN FITTING, SELF-SEALING QSMK-1/4-6

The stainless steel retaining ring within the fitting holds the tubing securely without damaging its surface. Vibration and pressure surges are safely absorbed. The tubing can be detached easily by pressing down the blue release ring. The appropriate outside tubing diameter is marked on the release ring. A nitrile rubber sealing ring guarantees a perfect seal between standard OD tubing and the body of the fitting.