Parker 41IF-3 Brass Inverted Flare Nut 3/16 in Tube Od

Product Description

The PARKER 41IF-3 is a brass inverted flare nut designed for use in flared tube connections requiring a 3/16 inch tube OD and a 3/8-24 UNF thread. This fitting serves as the mating nut in inverted flare assemblies, securing the flared end of a tube against a seat to create a leak-resistant hydraulic or refrigerant-grade connection. It carries a maximum working pressure of 1900 psi and is rated for temperatures up to 250 degrees F, making it suitable for demanding fluid and refrigerant line applications. Licensed HVAC technicians, plumbers, and refrigeration mechanics install this type of fitting in low-pressure and high-pressure line sets, brake lines, and fuel lines where inverted flare joints are specified.

This inverted flare nut is used in residential and light commercial applications wherever 3/16 inch OD soft tubing is flared and joined with an inverted-style seat fitting. Common install scenarios include refrigerant suction and liquid lines, fuel delivery systems, and hydraulic control circuits. It meets SAE J51 standards and carries UL listing, so it is appropriate for regulated installations where listed components are required. Sold individually, with a minimum order quantity of 5 units.

Key Features

• Brass construction for corrosion resistance and reliable flare seating
• 3/16 inch tube OD flare end connection matches standard soft copper and steel tubing
• 3/8-24 UNF thread for positive engagement with inverted flare fittings
• Rated to 1900 psi maximum working pressure
• Temperature rated to 250 degrees F (121 degrees C)
• Meets SAE J51 and is UL Listed for use in regulated installations

Compatibility

Designed as an OEM-style inverted flare nut for use with 3/16 inch OD flared tube assemblies using 3/8-24 UNF inverted flare fittings in hydraulic, refrigerant, fuel, and fluid line systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians, refrigeration mechanics, or plumbers. Depressurize and isolate the fluid or refrigerant line completely before disassembling any flare connection. Use an appropriately sized flare nut wrench to avoid rounding the hex; do not use pliers or adjustable wrenches on brass fittings. Verify tube flare geometry conforms to SAE J51 specifications before torquing the nut to avoid cracking or deforming the flare seat.