Midland Industries 62661 Cored Square Head Plug 4 in Npt Ss

Product Description

The MIDLAND INDUSTRIES 62661 is a cored square head plug designed for closing off pipe ends in threaded piping systems. Machined from 304 stainless steel, this fitting carries a 150 lb pressure class and connects via a 4-inch male NPT thread conforming to ASME B1.20.1 dimensional standards. The square head profile allows installation and removal with standard wrenches or pipe tools. At 3.595 pounds, it is a solid, heavy-duty fitting suited for industrial and commercial piping applications where corrosion resistance is a priority.

This plug is rated for use across a broad range of media including air, water, oil, natural gas, and steam. It is appropriate for 150 lb class threaded piping systems in commercial mechanical rooms, industrial process lines, and utility service applications. The 4-8 thread specification and 4-inch connection size make it a standard choice for larger-diameter pipe terminations in plumbing, HVAC hydronic, and industrial fluid handling systems. Licensed plumbers and pipefitters are the primary trade for this fitting.

Key Features

• 304 stainless steel construction provides corrosion resistance across multiple media types
• 4-inch male NPT thread meets ASME B1.20.1 dimensional standards
• 150 lb pressure class rating suitable for standard commercial and industrial service
• Compatible with air, water, oil, natural gas, and steam media
• Square head design accepts standard wrench installation for secure torque application
• Cored plug design reduces weight while maintaining structural integrity

Compatibility

Designed for use in 150 lb class threaded stainless steel piping systems carrying air, water, oil, natural gas, or steam media. Fits any standard 4-inch female NPT threaded pipe end conforming to ASME B1.20.1.

Installation Notes

Installation is performed by licensed plumbers or pipefitters. Depressurize and isolate the piping system fully before installing or removing any threaded plug. Apply an appropriate thread sealant or PTFE tape compatible with the system media before threading the plug into the female NPT fitting. Follow applicable IPC and IFGC code requirements for the specific media and system type.