Parker 42IFHD-5 Brass Inverted Flare Union 5/16 in

Product Description

The PARKER 42IFHD-5 is a brass inverted flare union fitting designed to join two flared tube ends in hydraulic, refrigeration, and fluid-transfer line applications. It features a 5/16-inch tube outside diameter and a 1/2-20 UNF thread on both ends, providing a secure flare-to-flare connection. Rated to 1200 psi maximum working pressure and 250 degrees F maximum working temperature, this union is built for demanding service conditions. At 0.70 inches overall length, the compact body fits tight under-hood or panel installations. Licensed and field technicians working on automotive brake lines, HVAC refrigerant circuits, or hydraulic tubing systems typically install this fitting.

This inverted flare union is suited for residential and light commercial fluid-line assemblies where two tube runs must be coupled inline. Common applications include automotive and truck brake hydraulic lines, HVAC copper or steel tubing connections, and other systems using SAE J51-standard inverted flare fittings. The brass construction resists corrosion in wet and oil-contaminated environments. The fitting ships individually but is available in minimum order quantities of 5 units, making it practical for service stock and repair kits.

Key Features

• Inverted flare union design joins two flared tube ends without a separate nut on each side
• 5/16-inch tube outside diameter with 1/2-20 UNF thread on both ends
• 1200 psi maximum working pressure for high-pressure fluid line service
• 250 degrees F maximum working temperature rating
• Brass construction for corrosion resistance in hydraulic and refrigerant service
• Meets SAE J51 standard and carries UL Listed certification

Compatibility

Designed as an OEM-style replacement or service fitting for fluid-transfer and hydraulic tubing systems using SAE J51 inverted flare connections with a 5/16-inch tube outside diameter and 1/2-20 UNF thread specification.

Installation Notes

Installation should be performed by a licensed technician familiar with hydraulic, brake, or refrigerant line service. Depressurize and isolate the fluid circuit completely before disconnecting or installing any fittings. Use the appropriate flaring tool to produce a clean, consistent inverted flare seat before threading the fitting; a damaged or uneven flare is the primary cause of leaks. Tighten to the tool manufacturer's recommended procedure for brass inverted flare fittings — do not over-tighten, as brass threads can gall or crack.