Parker 61NTA-4 Compression Tube Nut 1/4 Inch Brass

Product Description

The PARKER 61NTA-4 is a brass compression tube nut designed for use in compression-style tube fittings where a secure, leak-resistant mechanical connection is required. This nut mates with a compression fitting body to clamp a compression sleeve against the outside diameter of the tube, creating a reliable seal without soldering or flaring. It is rated for a maximum working pressure of 150 psi and a temperature range of -40 degrees F to 200 degrees F. The part meets DOT FMVSS571.106, SAE J1131, and SAE J246 standards. Plumbers, HVAC technicians, and fluid-system installers working on brake, fuel, or refrigerant-adjacent tubing circuits are the primary installers.

This compression tube nut is suited for residential and light commercial applications involving 1/4 inch outside diameter tubing. It is commonly used in hydraulic, pneumatic, and fluid-transfer systems where compression-style end connections are specified. The brass construction provides good corrosion resistance for use with copper, brass, or compatible plastic tubing in low-to-moderate pressure service. Applications include HVAC line sets, plumbing distribution lines, and equipment that requires field-serviceable tube connections conforming to DOT and SAE specifications.

Key Features

• Brass construction for corrosion resistance and durability in fluid-handling systems
• Compression end connection for tool-friendly, solderless tube attachment
• Rated to 150 psi maximum working pressure
• Operating temperature range of -40 degrees F to 200 degrees F
• Meets DOT FMVSS571.106, SAE J1131, and SAE J246 standards
• Fits 1/4 inch outside diameter tubing

Compatibility

Designed as an OEM-style compression tube nut for use with 1/4 inch outside diameter tubing in compression fitting assemblies conforming to SAE J1131 and SAE J246 specifications.

Installation Notes

Installation is performed by plumbers or HVAC technicians following applicable IPC or system-specific codes. Always depressurize and isolate the tubing circuit before disassembling or installing compression fittings. Thread the nut by hand first to avoid cross-threading, then tighten with a wrench to the fitting manufacturer's specified procedure. Do not overtighten, as brass compression nuts can deform the sleeve or tube if excessive force is applied.