Midland Industries 63655MS Square Head Plug 1in Mpt 316 Ss

Product Description

The MIDLAND INDUSTRIES 63655MS is a cored square head plug designed for use in threaded pipe systems requiring a durable, corrosion-resistant closure. Built from 316 stainless steel, this plug features a 1-inch male pipe thread (MPT) connection with a 1-11-1/2 thread specification and a 150 lb pressure class rating. The square head profile allows for positive wrench engagement during installation or removal. This fitting is commonly installed by licensed plumbers, pipefitters, and mechanical contractors working on fluid handling, chemical process, or industrial piping systems.

This plug is suited for residential and commercial applications where corrosion resistance is a priority, including marine environments, chemical lines, food-grade systems, and stainless piping assemblies. The SP-114 series fits into standard NPT threaded pipe runs where a cored square head plug is needed to cap or temporarily close a 1-inch port while allowing internal flow passage through the core.

Key Features

• 316 stainless steel construction for superior corrosion and chemical resistance
• 1-inch MPT connection with 1-11-1/2 thread for standard NPT compatibility
• 150 lb pressure class rating suitable for moderate-pressure piping systems
• Square head design provides positive wrench engagement for reliable make-up and removal
• Cored plug design allows passage through the fitting body where required

Compatibility

Designed as an OEM-style replacement fitting for standard 1-inch NPT threaded pipe systems within the SP-114 316 stainless steel fitting series.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or ASME B16.39 guidelines. Depressurize and drain the affected pipe section completely before removing or installing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before makeup. Do not overtighten, as excessive torque can damage stainless threads or distort the fitting.