Parker 66C-5-4 Compression Tube Connector 1/4-18 Brass

Product Description

The PARKER 66C-5-4 is a brass compression tube connector designed to join tubing to a female National Pipe Taper Fuel (FNPT) port in fluid and pneumatic systems. It features a 1/4-18 thread size conforming to the NPTF thread standard and meets SAE J-512 specifications. The connector is rated for a maximum working pressure of 300 psi and handles temperatures from -65 degrees F to 250 degrees F. The all-brass construction provides corrosion resistance and durability in a wide range of media. This fitting is commonly installed by licensed plumbers, HVAC technicians, and mechanical contractors working on tubing assemblies in trade and industrial applications.

The PARKER 66C-5-4 is suited for use in refrigeration, hydraulic, pneumatic, and general fluid transfer systems where a reliable compression-to-FNPT transition is required. The compression end accepts tubing without the need for flaring, while the FNPT end threads directly into standard female pipe ports. This makes it a practical choice for field service and new installations where tube-to-pipe transitions are common in tight or hard-to-access spaces.

Key Features

• Brass construction provides corrosion resistance across a broad range of fluids and gases
• 1/4-18 NPTF thread conforms to SAE J-512 standard for reliable, leak-resistant connections
• Compression x FNPT end connections allow tube-to-pipe transitions without flaring
• Rated to 300 psi maximum working pressure for demanding service environments
• Wide temperature range: -65 degrees F to 250 degrees F

Compatibility

Designed as an OEM-style replacement or service fitting for compression tube assemblies requiring a 1/4-18 NPTF female pipe thread connection in refrigeration, HVAC, and fluid system applications.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified mechanical contractor. Depressurize and isolate the system completely before removing or installing any fittings. Apply thread sealant or PTFE tape to the NPTF threads as appropriate for the media being conveyed, and verify the compression sleeve is properly seated before tightening. Follow applicable codes, including IFGC or IPC where relevant, and pressure-test the assembly before returning the system to service.