Swagelok B-605-4 Brass Tubing Insert Set 3/8 Inch OD 1/4 Inch ID

Swagelok B-605-4 Brass Tubing Insert, sized for 3/8 in. outside diameter tubing with a 1/4 in. internal bore, is a brass insert used with Swagelok tube fittings to support soft plastic tubing in the mating assembly. This part is cataloged as a spare insert and is designed to drop into the insert housing of compatible Swagelok fittings, providing the correct bore for the tubing and a secure grip within the fitting. The 3/8 in. OD x 1/4 in. ID specification ensures compatibility with standard soft plastic tubing used in lab and instrumentation setups that rely on Swagelok insert technology. As a genuine Swagelok component, it is intended to be used with the corresponding tubing and fittings to form a complete, leak‑tight connection in fluid handling paths. The brass construction offers corrosion resistance typical of Swagelok inserts and is suitable for use with the soft tubing size indicated by the part number. In practice, technicians use this insert as part of a maintenance or service kit to replace worn or damaged inserts in existing Swagelok assemblies, preserving the integrity and performance of the tubing connection without changing the overall fitting configuration.