Midland Industries 65659 Square Head Plug 2-1/2 in Mpt Iron

Product Description

The MIDLAND INDUSTRIES 65659 is a cored square head plug designed to close off pipe ends in low-pressure piping systems. Manufactured from malleable iron with a black finish, it accepts a 2-1/2-inch male pipe thread (MPT) connection with a 2-1/2-8 thread form. The plug is rated to 150 psi and handles temperatures from -20 to 350 degrees F, making it suitable for gas, air, and general plumbing applications where a threaded pipe terminus needs to be sealed. The square head profile allows a standard wrench to apply proper torque during installation. This fitting is an everyday part for plumbers and pipefitters working with black iron pipe systems.

This plug is used in residential and commercial piping installations where black malleable iron fittings are specified. Common applications include capping unused branch outlets on gas distribution piping, compressed air headers, and general-purpose fluid handling lines rated at 150 psi or below. It conforms to ANSI B16.3 dimensional standards, making it a code-compliant choice for work governed by the International Fuel Gas Code or International Plumbing Code wherever 150-pound malleable iron fittings are accepted.

Key Features

• Malleable iron construction with black finish for use in black iron pipe systems
• 2-1/2-inch MPT connection with 2-1/2-8 thread form
• 150 psi pressure rating suitable for gas, air, and plumbing service
• Operating temperature range of -20 to 350 degrees F
• Conforms to ANSI B16.3 dimensional standards
• Square head profile accepts standard open-end or adjustable wrench

Compatibility

Designed as an OEM-style replacement or new-installation fitting for black 150-pound malleable iron pipe systems conforming to ANSI B16.3.

Installation Notes

Installation is performed by licensed plumbers or pipefitters. Shut off and depressurize the affected line before threading the plug into the outlet. Apply an appropriate pipe thread sealant or PTFE tape to the male threads before make-up, following local code requirements. Do not overtighten; use a wrench on the square head to achieve a secure, leak-free connection without cracking the fitting.