Parker 129HB-5-6 Brass Barbed Elbow 3/8 Nptf X 5/16 Id

Product Description

The PARKER 129HB-5-6 is a brass barbed hose fitting in a 90-degree elbow configuration designed to connect a 5/16-inch ID hose to a 3/8-inch male NPTF threaded port. Machined from brass for corrosion resistance and durability, it accepts a hose barb on one end and a threaded male NPT connection on the other. The fitting is rated for service from -40 degrees F to 160 degrees F, making it suitable for a wide range of fluid transfer applications in HVAC, plumbing, and general mechanical systems. Plumbers, HVAC technicians, and mechanical contractors install this type of fitting when routing hose lines around obstacles or making directional changes in tight spaces.

This elbow barb fitting is used in residential and light commercial applications wherever a 5/16-inch ID flexible hose must transition to a threaded pipe connection at a 90-degree angle. Common install scenarios include condensate drain lines, low-pressure water lines, and fluid transfer assemblies requiring a secure hose-to-pipe junction. The threaded NPTF end provides a pressure-tight seal when properly engaged with a mating female NPT port.

Key Features

• Brass construction for corrosion resistance and long service life
• 3/8-inch male NPTF thread for secure, leak-resistant pipe connection
• 5/16-inch ID hose barb end with 0.353-inch barb diameter for positive hose retention
• Elbow configuration allows directional change in tight or congested installations
• Rated from -40 degrees F to 160 degrees F for broad application coverage
• Threaded connection type compatible with standard NPT female ports

Compatibility

Designed as an OEM-style replacement or service fitting for systems using 5/16-inch ID flexible hose and 3/8-inch male NPTF threaded connections in HVAC, plumbing, and fluid transfer assemblies.

Installation Notes

Installation is typically performed by licensed plumbers or HVAC technicians following applicable IPC or IFGC guidelines. Shut off fluid supply and depressurize the line before disassembly or installation. Apply thread sealant or PTFE tape to the male NPTF threads before engagement to ensure a leak-free seal. Do not overtighten the threaded connection, as brass fittings can be damaged by excessive torque.