Parker 66P-4-2 Compression Tube Connector 1/4 Od Brass

Product Description

The PARKER 66P-4-2 is a brass compression tube connector designed to join 1/4-inch OD tubing to a 1/8-27 NPTF female threaded port. One end accepts a compression fitting connection; the other end connects to a standard female NPT fitting. Rated to 150 psi maximum working pressure and a temperature range of 0 degrees F to 150 degrees F, this connector suits instrument, control, and fluid-transfer lines common in HVAC, refrigeration, and light industrial plumbing applications. Licensed trade professionals and experienced technicians install this type of fitting where a secure, leak-resistant transition between tubing and threaded pipe connections is required.

This connector is well suited for residential and light commercial HVAC control lines, refrigeration sensing lines, pneumatic instrument tubing, and small-bore plumbing connections. Its brass construction resists corrosion in typical air, water, and many fluid-handling service environments. It is particularly useful when routing 1/4-inch OD copper or compatible tubing into panels, valves, or instrumentation ports with 1/8-27 NPTF female inlets.

Key Features

• Compression x FNPT end connections for tool-friendly, reliable tube-to-port transitions
• Brass construction provides corrosion resistance in water, air, and compatible fluid service
• 1/4-inch tube OD compression end accommodates standard small-bore tubing
• 1/8-27 NPTF thread standard ensures a pressure-tight mechanical seal at the threaded port
• Rated to 150 psi maximum working pressure for control and instrument line service
• Operating temperature range from 0 degrees F to 150 degrees F covers typical HVAC and refrigeration environments

Compatibility

Designed as an OEM-style replacement or service fitting for applications requiring a 1/4-inch OD compression to 1/8-27 FNPT connection in brass construction.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or instrumentation technicians. Shut off and depressurize the system before removing or installing any compression fitting. Do not overtighten the compression nut; finger-tight plus a controlled fractional turn with a wrench is the standard practice for compression fittings. Apply thread sealant compatible with the service fluid to the NPTF male port per job specifications and applicable codes.