Parker 20-8 Barbed Tube Plug 0.377 in Id Brass

Product Description

The PARKER 20-8 is a multiple-barb tube plug designed to seal the open end of a flexible tube or hose. Manufactured from brass, it provides a secure, corrosion-resistant termination point without requiring clamps or adhesives. The barbed design locks into the tube interior as the fitting is pushed into place, creating a reliable mechanical seal. With a tube inside diameter of 0.377 inches and a tube outside diameter of 0.5 inches, this plug suits small-bore tubing commonly found in fluid transfer, pneumatic, and refrigeration line sets. It weighs 0.02 pounds and ships as a single-piece unit.

This plug is suited for light industrial, HVAC, plumbing, and pneumatic applications where a flexible tube end must be capped off cleanly. Typical uses include capping unused port lines, isolating branches during service work, or blanking off tubing during system pressure testing. The compact size makes it appropriate for tight spaces where larger fittings would interfere with adjacent components. Technicians working on small-diameter tubing runs in both residential and commercial settings will find this fitting straightforward to install.

Key Features

• Multiple-barb design locks into tube interior for a secure mechanical seal without clamps
• Brass construction provides corrosion resistance for fluid and pneumatic service
• Fits tube inside diameter of 0.377 inches and outside diameter of 0.5 inches
• Lightweight at 0.02 pounds — minimal system load in tight installations
• Single-piece, no-tool installation in most applications

Compatibility

Designed as an OEM-style replacement or service fitting for flexible tubing with an inside diameter of 0.377 inches and an outside diameter of 0.5 inches across HVAC, plumbing, pneumatic, and light industrial fluid transfer systems.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or qualified mechanical tradesperson. Before installing, depressurize and drain the tubing line completely to prevent fluid release during fitting insertion. Push the barbed plug firmly and squarely into the tube end until the barbs seat fully — partial insertion may allow pressure-induced pullout. Verify the tubing material is compatible with brass fittings before installation, particularly in systems carrying corrosive fluids.