Parker 41FX-8 Brass Flared Tube Short Nut 1/2 in Od

Product Description

The PARKER 41FX-8 is a brass flared tube short nut designed for use in 45-degree flare tube fittings assemblies. It threads onto a mating flare fitting body to secure a flared tube end, creating a leak-resistant mechanical connection in fluid and gas lines. Constructed from brass, it features a 3/4-16 UNF thread and accepts 1/2-inch tube OD with a 45-degree flare angle. Rated to 750 psi maximum working pressure and a maximum working temperature of 250 degrees F, this nut suits demanding service conditions in HVAC, refrigeration, plumbing, and related mechanical systems. Licensed HVAC technicians and plumbers are the primary installers.

This short nut is suited for residential and light commercial applications wherever a 45-degree flare connection is required on 1/2-inch OD tubing. Typical installations include refrigerant line sets, fuel gas piping, and hydraulic or pneumatic tubing runs where a SAE J512 or SAE J513 compliant flare connection is specified. The compact short-nut profile is used where space behind the fitting is limited compared to a standard-length nut.

Key Features

• Brass construction resists corrosion and provides good machinability for repeated service
• 45-degree flare angle conforms to SAE J512 and SAE J513 standards
• 3/4-16 UNF thread for secure, precise engagement with mating fitting body
• Rated to 750 psi maximum working pressure
• Maximum working temperature of 250 degrees F (121 degrees C)
• UL Listed; meets SAE J512 and SAE J513 standards

Compatibility

Designed as an OEM-style replacement or service nut for 45-degree flare tube fitting assemblies using 1/2-inch OD tubing with 3/4-16 UNF thread per SAE J512 and SAE J513 specifications.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or pipefitters working with flare-type tube connections. Before service, shut off and depressurize the line being worked on. Hand-tighten the nut onto the mating fitting body before applying a wrench to avoid cross-threading. Do not overtighten; consult applicable codes such as the IFGC or IPC for torque and assembly guidance specific to the system type and fluid being conveyed.