Parker 68P-4-2 Compression Tube Connector 1/4 Od Brass

Product Description

The PARKER 68P-4-2 is a brass compression tube connector designed to join 1/4-inch outside diameter tubing to a 1/8-27 male NPT threaded port. The fitting uses a compression-style connection on one end and a male NPTF thread on the other, making it suitable for creating leak-resistant joints in fluid or pneumatic lines without the need for soldering or flaring. Rated to 150 psi maximum working pressure and a temperature range of 0 to 150 degrees F, this connector suits light-duty instrumentation, refrigeration, and general-purpose fluid control applications. Plumbers, HVAC technicians, and industrial pipefitters install this type of fitting during panel, control, or instrument line assemblies.

This connector is used in residential and commercial systems where a compression tube must terminate or transition to an NPT threaded port. Typical installations include instrument sensing lines, control tubing runs, refrigeration gauge manifold piping, and low-pressure pneumatic circuits. The brass construction makes it appropriate for use with water, air, oil, and many common refrigerant-adjacent fluids. Its compact form factor fits in tight equipment panels and valve assemblies where space is limited.

Key Features

• Compression x MNPT end connections for tool-free tube attachment on one end
• 1/4-inch tube outside diameter compatibility with 1/8-27 NPTF male thread
• Brass construction for corrosion resistance in water, air, and oil service
• 150 psi maximum working pressure rating
• Operating temperature range of 0 to 150 degrees F
• NPTF thread standard for improved pressure-tight sealing without additional sealant

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/4-inch OD compression tube lines terminating at 1/8-27 NPTF male NPT threaded ports in light-duty fluid and pneumatic systems.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified pipefitter in accordance with applicable plumbing and mechanical codes. Shut off and depressurize the system completely before removing or installing any compression fitting. Hand-tighten the compression nut onto the fitting body, then advance with a wrench per standard compression fitting practice — do not overtighten, as brass fittings can deform. Apply thread sealant or PTFE tape to the NPTF threads as required by the system fluid and applicable code.