Parker 68C-7-4 Compression Tube Connector Brass Mnpt

Product Description

The PARKER 68C-7-4 is a brass compression tube connector designed to create a leak-tight, reusable joint between compression tubing and a male NPT port. Built to SAE J-512 standards, this connector features a 1/4-18 NPTF thread and handles working pressures up to 200 psi. The brass construction provides reliable corrosion resistance across a wide service temperature range, making it well suited for hydraulic, pneumatic, fuel, and refrigerant-adjacent plumbing lines. Licensed plumbers, HVAC technicians, and fluid power mechanics install this fitting wherever a direct compression-to-male-pipe connection is needed in tight or inline routing scenarios.

This fitting is used in residential and light commercial applications involving copper or compatible tubing routed to threaded ports on valves, manifolds, or equipment housings. Its compression-by-MNPT configuration makes it a common choice for instrument lines, fuel delivery systems, hydraulic circuits, and HVAC refrigerant sensing lines where a removable, pressure-rated mechanical joint is required without soldering or brazing. The NPTF thread form creates a pressure-tight seal at the threads, reducing reliance on tape or sealant compounds.

Key Features

• Brass construction for corrosion resistance and long service life in wet or humid environments
• 1/4-18 NPTF male pipe thread provides a pressure-tight mechanical seal at the threaded port
• Compression end accepts tubing for a tool-assisted, leak-tight connection without soldering
• Rated to 200 psi working pressure for use in moderate-pressure hydraulic and pneumatic circuits
• Wide temperature range from -65 degrees F to 250 degrees F suits refrigeration and steam-adjacent service
• Conforms to SAE J-512 for dimensional and performance standardization

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems requiring a compression-to-male-NPT connection in brass at a 1/4-18 thread size, conforming to SAE J-512 dimensional standards.

Installation Notes

This fitting is typically installed by licensed plumbers or HVAC technicians following applicable IPC or system-specific fluid handling codes. Shut off and depressurize the line completely before disconnecting or installing any compression fitting. Hand-tighten the compression nut first, then apply the manufacturer-recommended number of additional turns with a wrench, holding the fitting body steady to avoid twisting the tubing. Do not overtighten the compression nut, as this can deform the ferrule and cause leaks or tubing damage.