Parker 41FL-10 Brass Flared Long Nut 5/8 in Od 7/8-14 Unf

Product Description

The PARKER 41FL-10 is a brass flared tube long nut designed for use in flare-fitting assemblies on refrigeration, HVAC, and fluid-handling lines. It threads onto a mating flare fitting body to secure a 5/8-inch OD tube with a 45-degree flare seat. The 7/8-14 UNF thread provides a precise, leak-resistant mechanical connection. Rated to 650 psi maximum working pressure and 250 degrees F maximum working temperature, this long nut handles the demands of refrigerant lines, fuel systems, and hydraulic tubing where a standard short nut will not reach. Fabricated from brass for corrosion resistance and compatibility with a wide range of media.

This fitting is used in residential and commercial HVAC systems, refrigeration equipment, and fluid-power applications where 45-degree flare connections per SAE J512 and SAE J513 are specified. It is a standard component in compression and flare plumbing assemblies installed by HVAC technicians, refrigeration mechanics, and plumbers working on copper or soft-alloy tubing runs. The long-nut body provides additional thread engagement compared to a standard nut, which is useful in tight or recessed fitting configurations.

Key Features

• 45-degree flare seat conforms to SAE J512 and SAE J513 standards
• 5/8-inch tube OD fitment with 7/8-14 UNF thread
• 650 psi maximum working pressure
• 250 degrees F maximum working temperature
• Brass construction resists corrosion and is compatible with refrigerants, fuels, and hydraulic fluids
• UL Listed; meets SAE J512, SAE J513 requirements

Compatibility

Designed for use with 5/8-inch OD tubing in 45-degree flare fitting assemblies conforming to SAE J512 and SAE J513 standards.

Installation Notes

Installation is performed by a qualified HVAC technician, refrigeration mechanic, or licensed plumber. Depressurize and purge the system before disassembling any flare connection. Use a properly sized flaring tool to form the 45-degree seat on the tube end before threading the nut; a damaged or incomplete flare will cause leaks. Hand-tighten first, then torque with a properly sized open-end or flare-nut wrench — do not use pipe wrenches or adjustable wrenches, which can damage the hex and distort 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.