Parker 41FS-3 Brass Flared Tube Short Nut 3/16 in Od

Product Description

The PARKER 41FS-3 is a brass short nut designed for 45-degree flare tube connections in fluid and gas distribution systems. It mates with 3/16-inch OD tubing using a 3/8-24 UNF thread and forms a leak-resistant seal through metal-to-metal flare contact. At 0.62 inches overall length, the short-body design is suited for tight-clearance installations. Rated to 1900 psi maximum working pressure and 250 degrees F, this fitting handles the thermal and pressure demands common in refrigeration lines, hydraulic circuits, and fuel systems. HVAC technicians, plumbers, and fluid-system mechanics are the typical installers.

This fitting is used in residential and light commercial applications wherever 3/16-inch OD tubing is joined with a 45-degree SAE flare connection. Common install scenarios include refrigerant line sets, fuel delivery tubing, hydraulic instrument lines, and compressed-air distribution where a short nut profile is required to clear adjacent components. Brass construction provides corrosion resistance compatible with a wide range of working fluids and gases.

Key Features

• 45-degree SAE flare end connection for leak-resistant metal-to-metal sealing
• 3/16-inch tube OD with 3/8-24 UNF thread — conforms to SAE J512 and SAE J513
• Rated to 1900 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• Short-body profile at 0.62 inches overall length for tight-clearance installations
• UL Listed; meets SAE J512 and SAE J513 standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using 3/16-inch OD tubing with 45-degree SAE flare connections and 3/8-24 UNF threaded fittings.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or fluid-system mechanics. Depressurize and isolate the line before disassembly or fitting installation. Ensure the tube end is properly flared to 45 degrees using a calibrated flaring tool before threading the nut — do not attempt to seat an unflared or improperly flared tube. Refer to SAE J512 and applicable system codes for assembly torque guidance from the system OEM.