Parker 61CL-6 Compression Tube Long Nut 3/8 in Brass

Product Description

The PARKER 61CL-6 is a brass compression tube long nut designed to secure compression fittings in fluid and gas line assemblies. The long nut threads onto the fitting body at a 9/16-24 thread size and draws the ferrule tight against a 3/8 inch outside diameter tube, creating a leak-resistant mechanical seal without soldering or flaring. Rated for temperatures from -65 degrees F to 250 degrees F, this fitting suits a wide range of service conditions. It is installed by licensed plumbers, HVAC technicians, and refrigeration mechanics working on copper or compatible tubing systems.

This long nut is used in residential and light commercial plumbing, HVAC refrigerant piping, and instrument tubing applications where a standard compression connection is required. The extended nut length provides additional thread engagement, making it useful in installations where extra grip or reach is needed at the tube connection point. It is suited for new construction and retrofit work on compression-style tube fittings.

Key Features

• Brass construction for corrosion resistance in fluid and gas service
• Long nut design provides increased thread engagement over standard compression nuts
• Fits 3/8 inch outside diameter tubing with 9/16-24 thread size
• Wide temperature range: -65 degrees F to 250 degrees F
• Compression end connection requires no soldering or flaring

Compatibility

Designed as an OEM-style replacement or service component for compression tube fitting assemblies using 3/8 inch outside diameter tubing and 9/16-24 threaded fitting bodies.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians familiar with compression fitting assemblies. Shut off and depressurize the line before disassembly or installation. Hand-tighten the long nut onto the fitting body, then snug with a wrench — do not overtighten, as excess force can deform the ferrule and cause leaks. Follow applicable IPC or local plumbing code requirements for the specific fluid or gas service.