Parker 639F-8 Brass Flared Tube Plug 1/2 in 45 Degree

Product Description

The PARKER 639F-8 is a brass flared tube plug designed to seal off 1/2-inch OD tubing lines with a 45-degree flare connection. It threads to a 3/4-16 thread size and provides a reliable dead-end closure in fluid or gas systems where a line must be capped off cleanly. Rated to 750 psi maximum working pressure and up to 250 degrees F, this plug suits demanding service conditions found in refrigeration, hydraulic, and pneumatic plumbing assemblies. Licensed plumbers, HVAC technicians, and fluid-power mechanics install this fitting as part of routine system modifications or line decommissioning work.

This plug is appropriate for residential and light commercial applications where SAE 45-degree flare fittings are standard. Typical install scenarios include capping unused ports on manifolds, sealing off branch lines during system reconfiguration, and terminating refrigerant or hydraulic tubing during equipment service. The brass construction offers corrosion resistance compatible with refrigerant, water, and oil-based fluid systems. It meets SAE J512 and SAE J513 standards and carries a UL Listing, making it suitable for code-compliant installations.

Key Features

• 45-degree SAE flare end connection seats securely against flared copper or brass tubing
• Rated to 750 psi maximum working pressure for demanding system use
• Maximum service temperature of 250 degrees F (121 degrees C)
• Brass construction resists corrosion in refrigerant, hydraulic, and pneumatic service
• Meets SAE J512 and SAE J513 standards with UL Listing
• Compact overall length of 1.06 inches for tight-space installations

Compatibility

Designed for use with 1/2-inch OD SAE 45-degree flared tubing assemblies conforming to SAE J512 and SAE J513 specifications, typical in refrigeration, hydraulic, and pneumatic plumbing systems.

Installation Notes

Installation should be performed by a licensed HVAC technician, plumber, or fluid-power mechanic. De-pressurize and isolate the line completely before removing or installing any fitting. Use an appropriately sized flare nut wrench to avoid rounding the fitting hex. Do not overtighten — snug to hand-tight plus a controlled fraction of a turn with a wrench is sufficient to achieve a leak-free 45-degree flare seal.