Parker B20-5B Pneumatic Hose Coupling 1/4 in Brass

Product Description

The PARKER B20-5B is a brass pneumatic hose coupling designed for use in industrial compressed air and pneumatic fluid systems. It features a 1/4 inch body diameter with a hose barb thread type sized for 3/8 inch inside diameter hose. Built to the Industrial Interchange standard, it delivers a rated maximum working pressure of 300 psi across a wide operating temperature range of -40 degrees F to 250 degrees F. This coupler is installed by HVAC technicians, industrial maintenance mechanics, and pneumatic system specialists where a reliable, leak-resistant connection between a hose and a quick-disconnect circuit is required.

The B20-5B belongs to the Parker Series 20 Industrial Interchange family, making it compatible with other Industrial Interchange-style couplers and nipples commonly found in shop air systems, pneumatic tool lines, and light industrial automation. Its hose barb end accepts 3/8 inch ID flexible pneumatic hose, while the coupler body connects to the mating nipple in a standard Industrial Interchange socket. This fitting suits both permanent and field-serviceable installations in residential and commercial mechanical rooms, job-site air systems, and manufacturing environments.

Key Features

• Industrial Interchange (Series 20) pattern for broad cross-brand compatibility
• Brass construction for corrosion resistance and durability in pneumatic service
• 300 psi maximum working pressure rating
• Wide temperature range: -40 degrees F to 250 degrees F
• Hose barb end sized for 3/8 inch ID hose — no ferrule or clamp fitting required for many applications
• Overall length of 2.49 inches with 0.75 inch hex for wrench engagement

Compatibility

Designed as an OEM-style replacement or new-installation coupler for Industrial Interchange Series 20 pneumatic quick-disconnect systems accepting a 1/4 inch body coupler with a 3/8 inch ID hose barb connection.

Installation Notes

Installation is performed by a qualified technician or pipefitter. Before servicing any pneumatic line, depressurize the system completely and bleed residual air pressure from the circuit. Slide the hose barb end fully into the 3/8 inch ID hose and secure with an appropriate hose clamp rated for the working pressure. Use the 0.75 inch hex on the coupler body for wrench tightening; do not over-tighten or apply torque beyond what is needed to seat the fitting. Verify the completed connection is leak-free by bringing the system back to working pressure and inspecting with a suitable leak-detection method.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.