Midland Industries 107673 Square Head Plug 1/2 in Mpt Steel

Product Description

The MIDLAND INDUSTRIES 107673 is a forged steel square head plug designed to seal threaded pipe openings in plumbing, HVAC, and industrial piping systems. Featuring a 1/2-inch male pipe thread (MPT) with a 1/2-14 thread specification, this plug provides a secure, pressure-rated closure on female-threaded ports and fittings. The square head drive allows installation and removal with a standard wrench or socket, making it a practical choice for systems that require periodic access or future tie-in points. At 0.11 pounds, the forged steel construction delivers durability without unnecessary bulk.

This plug is used in residential and light commercial applications where a threaded pipe end needs to be capped or temporarily blocked. Common install scenarios include gas piping dead legs, water supply rough-ins, hydronic heating systems, and compressed air lines. Plumbers, pipefitters, and HVAC technicians reach for square head plugs when closing off unused ports on manifolds, valves, or tee fittings during system commissioning or future-phase rough-in work.

Key Features

• Forged steel construction for strength and durability in pressure applications
• 1/2-inch MPT connection with 1/2-14 thread specification for standard pipe compatibility
• Square head drive accepts a wrench or socket for reliable installation torque
• Compact profile: 0.95 inches tall, 0.7 inches long, 0.75 inches wide
• Lightweight at 0.11 pounds for easy handling and reduced system load

Compatibility

Designed as an OEM-style replacement or new-install component for standard 1/2-inch female NPT threaded ports found in forged steel pipe fitting assemblies across plumbing, HVAC, and industrial piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable codes such as the IPC or IFGC depending on the fluid or gas medium. Always depressurize and isolate the system before installing or removing threaded plugs. Apply an appropriate thread sealant or PTFE tape to the male threads before tightening. Do not overtighten, as forged steel fittings in softer female-threaded materials can cause damage to mating threads.