Parker 129HB-5-4 Brass Elbow Hose Barb Fitting 1/4 Nptf

Product Description

The PARKER 129HB-5-4 is a brass barbed hose fitting in a 90-degree elbow configuration, connecting a 1/4 inch male NPTF threaded port to a 5/16 inch inside diameter hose barb. The barb diameter measures 0.353 inches, sized to grip standard flexible hose and resist pull-off under pressure. Operating temperature range runs from -40 degrees F to 160 degrees F, making it suitable for a wide range of fluid transfer applications. This fitting is installed by plumbers, HVAC technicians, and mechanical contractors wherever a threaded port must transition to flexible hose at a 90-degree change of direction.

The 129HB-5-4 is used in residential and light commercial plumbing, HVAC, and fluid transfer systems. Typical applications include connecting flexible tubing to equipment ports, instrument lines, and low-pressure water or pneumatic circuits. The NPTF thread standard provides a pressure-tight seal on the male threaded end without relying solely on a sealant. This elbow configuration is particularly useful in tight spaces where a straight barb fitting cannot maintain adequate hose routing clearance.

Key Features

• Brass construction offers corrosion resistance and compatibility with water, air, and many hydraulic fluids
• 1/4 inch male NPTF thread provides a dry-seal, pressure-tight connection at the threaded end
• 5/16 inch ID hose barb with a 0.353 inch barb diameter grips standard flexible hose securely
• Elbow geometry allows 90-degree direction changes in tight or restricted installation spaces
• Rated from -40 degrees F to 160 degrees F for broad service temperature coverage

Compatibility

Designed as an OEM-style threaded hose barb elbow for use with 5/16 inch inside diameter flexible hose and equipment or manifolds with 1/4 inch NPTF female threaded ports.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off fluid supply and relieve system pressure before removing or installing any fitting. NPTF threads are designed for dry-seal assembly but thread sealant tape or compound may be applied per job requirements and local code. Do not overtighten brass fittings into cast or aluminum ports, as brass threads can gall or strip the mating material.