Parker 42F-5 Brass Flared Tube Union 5/16 in 45 Degree

Product Description

The PARKER 42F-5 is a brass flared tube union designed to join two flared tube lines in a single in-line connection. It features a 45-degree flare angle with flare x flare end connections and a 1/2-20 UNF thread size, accepting 5/16 inch outside diameter tubing. This fitting is rated for a maximum working pressure of 1200 psi and a maximum working temperature of 250 degrees F, making it suitable for demanding refrigeration, HVAC, and fluid-transfer applications. Licensed HVAC technicians, plumbers, and refrigeration mechanics install this fitting when a straight union connection is required between two flared copper or aluminum lines.

This union fitting is used in residential and light commercial HVAC systems, refrigeration lines, and hydraulic or pneumatic tubing assemblies where a leak-free, vibration-resistant flare connection is needed. It is appropriate for applications requiring SAE J512 and SAE J513 compliant fittings, as well as installations governed by UL Listing requirements. The compact overall length of 1.32 inches suits tight-space installations common in equipment rooms and rooftop units.

Key Features

• 45-degree flare angle with flare x flare ends for a secure, leak-free union connection
• Accepts 5/16 inch OD tubing with 1/2-20 UNF thread on both ends
• Rated to 1200 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• Brass construction for corrosion resistance and compatibility with refrigerant and hydraulic fluids
• Meets SAE J512, SAE J513, and UL Listing standards

Compatibility

Designed as an OEM-style replacement or new-installation flared tube union for HVAC, refrigeration, and fluid-transfer systems requiring SAE J512 and SAE J513 compliant, 45-degree flare connections on 5/16 inch OD tubing.

Installation Notes

This fitting is installed by licensed HVAC technicians or refrigeration mechanics. Depressurize and recover any refrigerant from the system before disconnecting existing fittings, in compliance with EPA Section 608 regulations. Ensure tubing ends are properly flared to 45 degrees using a calibrated flaring tool before assembly to prevent leaks. Do not overtighten; consult applicable SAE and system manufacturer guidelines for proper assembly practice.