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The LEGRIS 3166 56 60 is a push-to-connect plug-in reducer tube fitting designed to join pneumatic or fluid tubing of two different outer diameters in a single inline connection. Constructed from nylon, this fitting handles pressures up to 290 psi and connects 1/4 inch OD tubing to 3/8 inch OD tubing without tools or thread sealant. It is a standard component in compressed air distribution, pneumatic control lines, and fluid transfer assemblies found in industrial, HVAC, and mechanical systems. Licensed tradespeople and equipment technicians install this type of fitting during initial system builds and field service repairs.
This reducer fitting is suited for applications where two tubing sizes must be joined inline without an adapter manifold. Common install scenarios include pneumatic actuator supply lines, instrument air circuits, and light-duty fluid circuits where a quick, reliable push-in connection is preferred over compression or barbed fittings. The nylon body keeps weight low and resists corrosion in clean-air and compatible-fluid environments. It is sold individually, with a minimum order quantity of 5 units per order.
Designed as an OEM-style push-to-connect reducer for pneumatic and fluid transfer tubing with 1/4 inch and 3/8 inch outside diameters. Verify system pressure ratings and fluid compatibility with nylon before installation.
Depressurize and lock out the supply line before removing or installing any push-in fitting. Cut tubing square and deburr the end to ensure a full collet engagement and leak-free seal. Confirm the tubing OD matches the fitting port before seating — undersized or oversized tubing will not seal correctly. This type of fitting is typically installed by pipefitters, pneumatic system technicians, or licensed mechanical contractors.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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