Parker 41IFF-5 Brass Inverted Piloted Nut 5/16 in Od

Product Description

The PARKER 41IFF-5 is a brass inverted piloted nut designed for flared tube connections in fluid and refrigeration line assemblies. It features a 5/16-inch tube OD with a 1/2-20 UNF thread and is rated for a maximum working pressure of 1200 psi and a maximum working temperature of 250 degrees F. This fitting is a small but critical component used to secure flared tubing at inverted flare connection points. It is typically installed by HVAC technicians, refrigeration mechanics, and plumbers working on copper or compatible tubing systems where a reliable, leak-free mechanical joint is required. The brass construction resists corrosion and provides good machinability for repeated assembly cycles.

This nut is suited for residential and light commercial applications involving refrigerant lines, hydraulic tubing, and fuel or fluid transfer systems where inverted flare fittings are specified. It meets SAE J51 standards and carries a UL Listing, making it appropriate for systems that require certified components. The 1/2-20 UNF thread allows precise engagement with standard inverted flare male fittings commonly found in HVAC, automotive, and plumbing installations.

Key Features

• Brass construction for corrosion resistance and reliable sealing at flare connections
• 1/2-20 UNF thread standard for compatibility with common inverted flare male fittings
• Rated to 1200 psi maximum working pressure for demanding fluid system applications
• Maximum working temperature of 250 degrees F suitable for refrigerant and fuel line service
• Meets SAE J51 standards and is UL Listed for certified system installations
• Compact overall length of 0.62 inches for use in tight spaces

Compatibility

Designed as an OEM-style replacement or service fitting for 5/16-inch OD flared tube assemblies using 1/2-20 UNF inverted flare connections in HVAC, refrigeration, and fluid transfer systems.

Installation Notes

Installation should be performed by a qualified HVAC technician, refrigeration mechanic, or licensed plumber following applicable SAE and system-specific guidelines. Always depressurize and evacuate the line before removing or replacing fittings. Hand-thread the nut onto the male fitting before applying a wrench to avoid cross-threading the brass. Inspect the flare seat for nicks or deformation prior to assembly, as a damaged flare surface will prevent a leak-free connection.