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The EATON 611X3 is a brass compression tube nut designed to secure tubing within compression-style fittings used in fluid and gas line assemblies. The nut threads onto a compression fitting body, drawing the ferrule against the tubing to create a leak-resistant mechanical seal. Constructed from brass, it offers reliable corrosion resistance in a wide range of service environments. It is rated for temperatures from -65 degrees F to 250 degrees F, making it suitable for both refrigeration and heating applications. Licensed plumbers, HVAC technicians, and pipefitters typically install this component during tubing assembly or repair work.
The 611X3 compression tube nut is used in residential and light commercial plumbing, HVAC, and refrigeration systems wherever compression-style tube fittings are specified. It is a standard hardware component found in copper and compatible soft-metal tubing installations. Technicians reach for this nut when assembling or reconnecting compression joints on refrigerant lines, water supply lines, or instrumentation tubing runs.
Designed as an OEM-style replacement or service component for compression tube fitting assemblies in plumbing, HVAC, and refrigeration applications.
Installation is typically performed by a licensed plumber or HVAC technician. Shut off fluid or gas supply and depressurize the line before disassembling any compression fitting. Hand-tighten the nut onto the fitting body before applying a wrench to avoid cross-threading. Follow applicable IPC or IFGC guidelines for the specific piping system being serviced.
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