Parker 28-4-2 Barbed Tube Male Connector 1/8-27

Product Description

The PARKER 28-4-2 is a barbed tube male connector designed for secure, leak-resistant tube-to-male-thread connections in fluid and pneumatic systems. The fitting features a 0.17-inch tube inner diameter and a 1/8-27 male thread, with multiple barbs along the tube end to grip tubing and resist pull-out under pressure. Constructed from brass, it resists corrosion in both liquid and low-pressure air applications. This type of fitting is commonly installed by plumbers, HVAC technicians, and pneumatic system technicians in applications where a permanent or semi-permanent barbed connection to a male-threaded port is required.

This connector is suited for residential and light commercial plumbing, HVAC control tubing, pneumatic control lines, and fluid transfer systems where a 1/8-27 threaded port is present. The barbed end accepts tubing with a 0.17-inch inner diameter and approximately 1/4-inch outer diameter. It is a compact, single-piece fitting appropriate for tight installation spaces and low-to-moderate pressure service lines. Trade professionals use these fittings to terminate flexible tubing runs at threaded ports on valves, manifolds, and equipment housings.

Key Features

• Multiple barbs grip tubing and resist pull-out without additional clamps in low-pressure applications
• 1/8-27 male thread for direct connection to standard NPT-style threaded ports
• 0.17-inch tube inner diameter accommodates standard small-bore flexible tubing
• Brass construction provides corrosion resistance in wet and pneumatic environments
• Compact single-piece design simplifies installation in confined spaces

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems with 1/8-27 male-threaded ports and flexible tubing with a 0.17-inch inner diameter and 1/4-inch outer diameter.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off system pressure and depressurize the line before removing or installing any fitting. Apply thread sealant tape or compound to the male threads in accordance with applicable IPC or IFGC guidelines before threading into the receiving port. Do not over-tighten brass fittings, as the material can crack under excessive torque; hand-tighten and snug with a wrench to a firm stop.