Parker 68HD-4-6 Compression X Mnpt Brass Connector 3/8 in

Product Description

The PARKER 68HD-4-6 is a brass compression tube connector designed to join a compression tube end to a male NPT threaded port in fluid and gas distribution systems. This fitting transitions a compression connection on one end to a 3/8 inch MNPT thread on the other, providing a secure, leak-resistant joint rated for up to 2100 psi working pressure. Constructed from brass, it delivers corrosion resistance suitable for water, hydraulic, and pneumatic service lines. Plumbers, HVAC technicians, and pipefitters install this type of connector when routing tubing into threaded manifolds, valves, or equipment ports.

This connector is suited for both residential and light commercial applications where compression tubing meets a threaded male port. Common install scenarios include water supply lines, refrigeration tubing connections, pneumatic control circuits, and hydraulic distribution runs. The 3/8 inch thread size fits standard NPT port sizes found across a wide range of valves, regulators, and instrumentation fittings in trade plumbing and mechanical systems.

Key Features

• Brass construction provides corrosion resistance for water, air, and hydraulic service
• Compression x MNPT end connections allow tube-to-thread transitions without soldering or flaring
• 2100 psi maximum working pressure rating supports demanding system requirements
• 3/8 inch thread size matches common NPT port sizes in trade applications
• Compact single-piece connector reduces potential leak points in the assembly

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems requiring a compression to male NPT threaded connection at a 3/8 inch thread size.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or pipefitters in accordance with applicable codes such as the IPC or IFGC. Shut off and depressurize the system completely before removing or installing any compression fitting. Hand-tighten the compression nut onto the tube, then use a wrench to snug the connection per the fitting manufacturer guidelines — do not overtighten, as brass compression fittings can crack if over-torqued. Verify system pressure and inspect for leaks before returning the system to service.