Parker 685HB-6-4 Barbed Hose Fitting 3/8 Id Brass

Product Description

The PARKER 685HB-6-4 is a brass male connector barbed hose fitting designed for secure, leak-resistant fluid connections in hydraulic and pneumatic hose assemblies. It features a 7/16-20 SAE straight thread on one end and a beaded hose barb on the other, accepting 3/8 inch inside diameter hose. The beaded barb profile improves hose retention under pressure and vibration. Rated for service from -40 degrees F to 160 degrees F, this fitting suits a wide range of industrial and mobile equipment fluid transfer applications. Licensed plumbers, HVAC technicians, and equipment mechanics routinely specify this type of fitting for low-pressure fluid and refrigerant-compatible line connections.

This fitting is suited for residential and light commercial applications where a threaded port must transition to a flexible hose run. It is commonly installed in HVAC equipment condensate and refrigerant line assemblies, hydraulic power units, and general-purpose fluid transfer systems that use 3/8 inch ID hose terminated at an SAE straight-thread port. The 7/16-20 thread size is a standard SAE designation found on OEM equipment ports across multiple industries.

Key Features

• Beaded hose barb profile improves grip and reduces hose blowoff risk
• 7/16-20 SAE straight thread for positive, non-tapered port engagement
• Accepts 3/8 inch inside diameter hose
• Brass construction resists corrosion in fluid transfer service
• Wide temperature range: -40 degrees F to 160 degrees F
• Compact overall length of 1.39 inches fits tight installation spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems equipped with 7/16-20 SAE straight-thread ports and 3/8 inch ID flexible hose connections.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or qualified mechanics. Depressurize and drain the system fully before removing or installing any hose fitting. Apply a suitable thread sealant or O-ring to the SAE straight thread port as required by the equipment manufacturer; SAE straight threads are not self-sealing by thread form alone. Ensure the hose is fully seated past the bead before applying a clamp to maintain a secure, leak-free connection.