Parker PT-00306 Compression Tube Plug 3/8-19 Thread Steel

Product Description

The PARKER PT-00306 is a steel compression tube plug designed to seal off open compression fittings and tubing ends in fluid and pneumatic line applications. This plug threads directly into a compatible compression fitting body, blocking flow and maintaining system integrity during service, testing, or when a port is temporarily or permanently taken out of service. Constructed from steel for durability under pressure, it carries a 3/8-19 inch thread size. Sold in a package of five, it suits shops and field techs who need spares on hand for multiple service calls or installations.

This plug is used in hydraulic, pneumatic, and fluid-handling systems where compression-style fittings are standard. Typical applications include HVAC refrigerant lines, compressed air systems, and general fluid conveyance plumbing. It is well suited for capping unused ports on manifolds, valves, or distribution blocks during system modifications or staged commissioning. Licensed HVAC technicians, plumbers, and industrial pipefitters are the primary installers.

Key Features

• Steel construction for strength and corrosion resistance in pressurized line applications
• 3/8-19 inch thread size fits standard compression fitting bodies of that specification
• Compression-style seating provides a reliable, leak-resistant closure without additional sealant
• Packaged in quantities of five to support multi-port or multi-job service needs
• Compact form factor fits standard fitting wrenches and tight installation spaces

Compatibility

Designed as an OEM-style replacement or service component for compression tube fitting assemblies using a 3/8-19 inch thread size.

Installation Notes

Installation should be performed by a licensed tradesperson familiar with compression fitting systems. De-pressurize and isolate the affected line completely before removing any existing fittings or installing this plug. Use the appropriate open-end or adjustable wrench sized for the fitting body — do not over-tighten, as steel compression plugs can distort the seat if excessive torque is applied. Follow applicable codes such as NEC, IFGC, or IPC depending on the system type being serviced.