Parker 42F-4 Brass Flared Tube Union 1/4 in 45 Degree

Product Description

The PARKER 42F-4 is a brass flared tube union designed to join two flared tubing runs in a single inline connection. It accepts 1/4-inch tube OD on both ends with a 45-degree flare angle and 7/16-20 UNF threads, conforming to SAE J512 and SAE J513 standards. Rated for a maximum working pressure of 1,400 psi and a maximum working temperature of 250 degrees F, this fitting is built for reliable service in refrigeration, HVAC, and fluid-handling lines. Licensed HVAC technicians and plumbers install this union when splicing or extending flared copper or aluminum tubing runs in the field.

The 42F-4 is used in residential and light commercial HVAC systems, refrigeration circuits, and hydraulic or pneumatic fluid lines where a flare-to-flare union connection is required. Its compact overall length of 1.17 inches makes it suitable for tight installation spaces. The fitting is appropriate wherever SAE 45-degree flare connections are specified, including suction and liquid line repairs, refrigerant piping, and low-pressure pneumatic circuits.

Key Features

• 45-degree SAE flare angle on both ends, conforming to SAE J512 and SAE J513
• Rated to 1,400 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• Brass construction for corrosion resistance and compatibility with copper tubing systems
• Compact 1.17-inch overall length suits confined install spaces
• UL Listed; meets SAE J512, SAE J513, and UNF thread standards

Compatibility

Designed as an OEM-style replacement or field-service fitting for SAE 45-degree flare tube union applications using 1/4-inch OD tubing with 7/16-20 UNF threads.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber familiar with flared tubing connections. De-energize the system and recover any refrigerant charge before breaking the line, in accordance with EPA Section 608 requirements. Use a calibrated flaring tool to produce a clean, crack-free 45-degree flare seat before assembling the union. Do not overtighten flare nuts; hand-tighten first, then use a wrench to snug the connection without distorting the flare seat.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.