Parker 68HD-8-4 Compression Tube Connector 1/2 in Od Brass

Product Description

The PARKER 68HD-8-4 is a brass compression tube connector designed to join 1/2-inch outside diameter tubing to a male NPT threaded port. It uses a compression-style end connection that creates a secure, leak-resistant seal without soldering or welding. The mating end is a male NPT thread, making it compatible with standard threaded pipe and fittings used across plumbing, refrigeration, and instrumentation systems. Rated to a maximum working pressure of 1150 psi, this connector is built for demanding service conditions. Plumbers, HVAC technicians, and instrumentation mechanics install this type of fitting where tubing must terminate or transition to a threaded connection point.

This compression-to-MNPT connector is suited for use in residential and commercial plumbing, HVAC refrigerant line accessories, compressed gas distribution, and light instrumentation tubing runs. It is a common choice when joining soft copper or compatible tubing to a threaded valve, manifold, or equipment port. The compression design allows for field installation without specialized tooling beyond a standard wrench, making it practical for service and retrofit work.

Key Features

• Compression x MNPT end connections for tubing-to-threaded-port transitions
• Fits 1/2-inch outside diameter tubing
• Maximum working pressure of 1150 psi
• Brass construction for corrosion resistance and durability
• MPT thread standard for compatibility with standard pipe fittings
• No soldering required — compression seal achieved with standard hand tools

Compatibility

Designed as an OEM-style compression fitting for use with 1/2-inch OD tubing and standard male NPT threaded ports in plumbing, HVAC, and instrumentation applications.

Installation Notes

This fitting is typically installed by licensed plumbers or HVAC technicians. Before installation, shut off the relevant fluid or gas supply and relieve system pressure. Ensure tubing is cut cleanly and squarely, and that the compression nut and ferrule are properly seated before tightening. Do not overtighten the compression nut, as this can deform the ferrule and compromise the seal.