Swagelok SS-600-7-4 Fitting Female Connector 3/8 In Tube OD To 1/4 In FNPT

Swagelok SS-600-7-4 is a stainless steel straight tube fitting that joins 3/8 in. outside-diameter tubing to a 1/4 in. FNPT (female NPT) port, delivering a compact, leak‑tight connection for instrumentation and process piping. As a female connector in the Swagelok SS-600 series, this part is designed for use with Swagelok tube fittings’ standard ferrule-based sealing system and is offered in a basic, non-gaugeable form; a gaugeable variant is available as SS-600-7-4RJ for testing threaded joints. The unit is constructed from stainless steel, providing durability and corrosion resistance in demanding environments, and it features a 3/8 in. OD tube input paired with a 1/4 in. FNPT thread on the other end, enabling direct interface between tubing and pipe-thread ports. The basic ordering number is SS-600-7-4, with the RJ gaugeable option denoting added verification capability for the threaded connection. This fitting is ideal when a reliable transition from 3/8 in. tubing to a 1/4 in. FNPT port is required, offering Swagelok’s proven performance in a compact, plug-and-play straight configuration that fits within standard tubing and piping layouts.