Parker 159F-5-4 Brass Male 45 Elbow 5/16 in Flare X Mnptf

Product Description

The PARKER 159F-5-4 is a brass male 45-degree flared tube elbow fitting designed for use in fluid and gas lines requiring a reliable angled connection. It accepts a 5/16-inch tube OD on the flare end and connects to a 1/4-18 NPTF male thread on the pipe end. The 45-degree angle allows directional routing in tight spaces without bending tubing. Constructed from brass, this fitting provides corrosion resistance and good machinability, making it a standard choice for HVAC refrigerant lines, fuel lines, and hydraulic or pneumatic systems where flare-to-threaded transitions are required. Installation is performed by licensed HVAC technicians, plumbers, or pipefitters.

This fitting is suited for residential and light commercial applications involving copper or compatible tubing routed to NPTF-threaded ports. Typical use cases include refrigerant line connections, fuel delivery systems, and compressed air or hydraulic circuits where a 45-degree directional change is needed at a threaded port. The Flare x MNPTF end configuration makes it a direct interface between flared tubing and NPT-tapped components such as valves, manifolds, or equipment housings.

Key Features

• 45-degree male elbow geometry routes tubing at an angle without field bending
• 5/16-inch tube OD flare end for secure, leak-resistant tube connection
• 1/4-18 NPTF thread provides pressure-tight metal-to-metal sealing without sealant when properly torqued
• Brass construction offers corrosion resistance and compatibility with a wide range of fluids and gases
• Flare x MNPTF end configuration for direct tube-to-threaded-port transitions
• Compact, lightweight design at 0.07 pounds for easy handling in confined spaces

Compatibility

Designed as an OEM-style replacement or service fitting for systems using 5/16-inch OD flared tubing with 1/4-18 NPTF threaded ports, consistent with standard flare fitting applications in HVAC, refrigeration, fuel, and fluid power systems.

Installation Notes

This fitting should be installed by a qualified HVAC technician, pipefitter, or plumber following applicable codes such as the IFGC or system manufacturer specifications. Always depressurize and isolate the line before disassembling or installing any fitting. Flare the tubing with a proper flaring tool to the correct 45-degree angle before seating the fitting to ensure a leak-free connection. Do not overtighten, as brass fittings can be damaged by excessive torque.