Swagelok SS-400-R-12 Reducer Tube Fitting Adapter

Two Swagelok SS-400-R-12 stainless steel reducer tube fittings, each connecting a 1/4 in. outside diameter tube to a 3/4 in. outside diameter tube within a Swagelok tube-fitting system. The SS-400-R-12 designation identifies a reducer-style fitting that provides a size transition between two tube diameters in a single connection. These fittings are designed for use with standard Swagelok tubing assemblies and are compatible with the Swagelok tube fittings family, enabling reliable, repeatable connections in fluid-handling and instrumentation lines. Typical applications include laboratory, process, and industrial piping environments where a change from 1/4 in. to 3/4 in. tube diameter is required to route or adapt flow, test instrumentation runs, or integrate components with differing tube sizes. This pair is sold as a set, offering two identical reducers for installations that require multiple transitions or spare fittings in the same kit.