Parker 41IFF-2 Brass Inverted Piloted Flare Nut 1/8 in

Product Description

The PARKER 41IFF-2 is a brass inverted piloted nut designed for flared tube connections in refrigeration, HVAC, and fluid-transfer systems. It accepts 1/8-inch tube OD with a 5/16-28 UNF thread and is rated for working pressures up to 2800 psi and temperatures up to 250 degrees F. The inverted piloted design seats securely against a mating flare seat, maintaining a leak-free connection under pressure cycling. At 0.52 inches overall length, this compact fitting is suited for tight plumbing runs. Licensed HVAC technicians and refrigeration mechanics are the primary installers, though it also sees use in hydraulic and pneumatic lines.

This fitting is appropriate for residential and commercial HVAC systems, refrigeration equipment, and other fluid or gas lines where a flared inverted nut connection is specified. It is particularly common in low-pressure refrigerant lines, fuel systems, and instrument tubing where SAE J51 flare fittings are standard. The brass construction provides corrosion resistance in both wet and dry service environments, making it a reliable choice across a wide range of trade applications.

Key Features

• Inverted piloted nut design for secure, leak-resistant flare seating
• Brass construction offers corrosion resistance and long service life
• Rated to 2800 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• 5/16-28 UNF thread matches SAE J51 and UL Listed standards
• Compact 0.52-inch overall length suits tight installation spaces

Compatibility

Designed as an OEM-style replacement or service fitting for flared tube assemblies requiring a 1/8-inch tube OD inverted piloted nut with 5/16-28 UNF thread, conforming to SAE J51 specifications.

Installation Notes

Installation should be performed by a qualified HVAC technician, refrigeration mechanic, or pipefitter familiar with flare fittings. Always depressurize and isolate the system before removing or installing any fitting. Ensure the tube end is cleanly cut, deburred, and properly flared to the correct SAE angle before seating the nut. Overtightening a flare nut can crack the flare seat or distort the tube, so follow the fitting manufacturer's tightening guidelines.