Cerrobrass 122A-D Hex Plug 1/2 in Mnptf 1200 Psi

Product Description

The CERROBRASS 122A-D is a hex plug fitting designed to seal and terminate threaded pipe ends in industrial and commercial piping systems. It features a 1/2 inch male NPTF thread and is rated to 1,200 psi maximum working pressure, making it suitable for demanding fluid and gas line applications. The hex head allows standard wrench installation for a secure, leak-resistant seal. Plumbers, pipefitters, and mechanical contractors regularly specify this type of plug for pressure testing, system capping, and permanent line termination across a range of piping configurations.

This plug is appropriate for use in residential, commercial, and light industrial piping systems where a reliable threaded cap is required. The MNPTF connection type provides a dryseal thread form that seals on the threads themselves, reducing dependence on thread sealant tape alone. Typical applications include capping unused branch connections, isolating sections of a system during service, and pressure testing completed assemblies.

Key Features

• 1/2 inch male NPTF thread for dryseal connection
• 1,200 psi maximum working pressure rating
• Hex head design accepts standard wrench for installation and removal
• MNPTF thread classification for compatibility with NPTF-threaded fittings and pipe
• Compact, single-piece construction with no internal components

Compatibility

Designed as an OEM-style replacement or service fitting for 1/2 inch MNPTF-threaded pipe connections in industrial, commercial, and residential piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with applicable codes such as the IPC or IFGC. Shut off system pressure and depressurize the line completely before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape per the system fluid and pressure requirements, even when using dryseal NPTF threads. Do not over-torque the fitting, as this can crack the hex head or damage mating threads.