Parker 61C-4 Compression Tube Nut 1/4 in Od Brass

Product Description

The PARKER 61C-4 is a brass compression tube nut designed to secure compression fittings in fluid and pneumatic line assemblies. It mates with a compression sleeve and fitting body to create a leak-resistant mechanical connection on 1/4-inch outside-diameter tubing. The nut features a 7/16-24 thread and is rated for working pressures up to 300 psi across a wide service temperature range of -65 degrees F to 250 degrees F. Manufactured from brass to resist corrosion, this nut meets SAE J-512 standards. It is commonly installed by HVAC technicians, refrigeration mechanics, and plumbers working on small-bore tubing runs in equipment and utility lines.

This compression tube nut is suited for use in residential and light commercial applications where 1/4-inch OD tubing connections are required. Typical installation scenarios include refrigeration line sets, instrument tubing, fuel lines, and hydraulic or pneumatic control circuits that call for an SAE J-512 compliant compression fitting system. The brass construction makes it compatible with copper and compatible soft-metal tubing used in these systems.

Key Features

• Brass construction provides corrosion resistance for refrigerant, fuel, and fluid service environments
• 7/16-24 thread size conforms to SAE J-512 for standardized fitment
• Rated to 300 psi maximum working pressure
• Wide temperature range: -65 degrees F to 250 degrees F
• Fits 1/4-inch outside-diameter tubing
• Compression end connection — no soldering or brazing required

Compatibility

Designed as a SAE J-512 compliant compression tube nut for use with 1/4-inch outside-diameter tubing and compatible Parker or equivalent SAE-standard compression fitting bodies and sleeves.

Installation Notes

Installation is typically performed by a licensed HVAC technician, refrigeration mechanic, or plumber. Depressurize and isolate the line before disassembly or installation. Hand-tighten the nut onto the fitting body, then advance with a wrench per the fitting manufacturer's torque procedure — do not overtighten, as brass threads can be damaged. Verify no leaks under system pressure before returning the line to service.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.