Johnson Controls F-300-21 Coupling Fitting

Johnson Controls F-300-21 Coupling Fitting is a reliable barb-style connector designed for quick, secure tubing joins. The F-300-21 connects 3/8 inch to 1/4 inch tubing with a practical barb design that ensures a tight fit in HVAC and equipment lines.

Built for durable performance, this coupling minimizes leaks and maintains steady flow in air lines and other small-diameter tubing. It provides a compact, dependable hose connector from a trusted brand, ideal for service and installation tasks.

• Barb-style coupling securely joins 3/8" to 1/4" tubing
• Suitable for HVAC and air-line applications
• Durable construction for reliable, leak-resistant operation
• Compact design that fits tight spaces
• Brand-backed quality from Johnson Controls