Legris 3666 08 10 Push-to-connect Tube Stem Fitting

Product Description

The LEGRIS 3666 08 10 is a push-to-connect tube-to-stem pneumatic and fluid fitting made from nickel-plated brass. It provides a fast, tool-free tube connection to a stem-style port, using a push-in mechanism that locks the tube on insertion and releases with a collar press. The fitting handles both liquid and gas service and is rated to 435 psi maximum working pressure across a temperature range of -4 degrees F to 302 degrees F. The FKM O-ring ensures compatibility with a broad range of media. This fitting is installed by HVAC technicians, plumbers, and fluid-system technicians working on control lines, instrument air, or process fluid circuits.

This fitting is suited for residential and light commercial applications where quick tube terminations are required at stem-port connections. The push-to-connect design reduces installation time on pneumatic control systems, process lines, and fluid distribution assemblies. It accepts tube with an 8 mm inside diameter connecting to a 10 mm stem, making it a transition fitting commonly used when routing instrument or control tubing to manifolds, valves, or actuators that carry liquid or gas media.

Key Features

• Push-to-connect mechanism allows tool-free tube insertion and collar-press release
• Nickel-plated brass construction resists corrosion in both liquid and gas service
• Rated to 435 psi maximum working pressure
• Wide temperature range: -4 degrees F to 302 degrees F
• FKM O-ring provides broad media compatibility including many oils and chemicals
• Tube-to-stem configuration bridges tube runs to stem-port components

Compatibility

Designed for use with liquid and gas media systems requiring a push-to-connect tube-to-stem fitting with an 8 mm by 10 mm tube outside diameter configuration. No specific model or system compatibility data was provided by the manufacturer for this SKU.

Installation Notes

Installation does not require tools for tube insertion, but the receiving stem port should be depressurized and the system shut down before making or breaking connections. Ensure the tube end is cut square and deburred before inserting into the fitting collar to achieve a proper seal. Follow applicable plumbing and pneumatic codes for the installation environment, including ASME B31.3 for process piping where applicable. Inspect the FKM O-ring seat for contamination before reassembly if the fitting is reused.