Parker 68P-8-4 Compression Tube Connector 1/2 in Od 1/4 Mnpt

Product Description

The PARKER 68P-8-4 is a straight compression tube connector designed to join 1/2-inch OD tubing to a 1/4-inch male NPT threaded port. The body is molded from acetal copolymer, a rigid engineering plastic that resists moisture, mild chemicals, and wear in fluid-handling systems. The compression end grips the tube mechanically, creating a leak-resistant seal without soldering or flaring. Rated to 150 psi maximum working pressure, this fitting handles moderate-pressure lines in water, pneumatic, and compatible fluid systems. Plumbers, HVAC technicians, and industrial maintenance trades install this type of connector when transitioning from tubing to a threaded pipe port.

The 68P-8-4 is suited for light-duty fluid and pneumatic distribution lines in residential and light commercial applications. The acetal copolymer construction makes it appropriate for clean water service and many non-aggressive fluid media. Operating temperature range runs from 0 degrees F minimum to 149 degrees F maximum, keeping it within the service window for most potable water, instrument air, and low-pressure process lines. Install locations typically include equipment panels, filtration assemblies, and instrument tubing runs where a compact straight connector is needed between a tubing line and a threaded port.

Key Features

• Compression x MNPT end connections allow tool-free tube insertion with standard wrench tightening on the NPT side
• Acetal copolymer body resists moisture absorption and mild chemical exposure
• 150 psi maximum working pressure rating for moderate-pressure service
• Straight thread size of 11/16-20 on the compression nut
• Operating range from 0 degrees F to 149 degrees F suits most water and instrument-air applications
• Compact straight configuration minimizes installation footprint

Compatibility

Designed as an OEM-style compression fitting for 1/2-inch OD tubing connecting to 1/4-inch male NPT threaded ports in light commercial and residential fluid or pneumatic systems.

Installation Notes

A licensed plumber or qualified mechanical technician should install this fitting in accordance with applicable plumbing codes such as the IPC. Shut off and depressurize the supply line before installation. Insert the tubing squarely and fully into the compression end before tightening the nut to avoid uneven seating and potential leaks. Do not over-torque the NPT threads into the mating port; use thread sealant tape or compound rated for the fluid service on the tapered NPT connection.