Midland Industries 62640MS Hex Head Plug 3 in Male Npt Ss

Product Description

The MIDLAND INDUSTRIES 62640MS is a cored hex head plug designed for threaded pipe systems requiring a reliable, pressure-rated closure. Built from 304 stainless steel, this fitting handles a working pressure class of 150 lb and connects via a 3-inch male NPT thread. The hex head design provides a standard wrench flat for secure installation and removal. At 1.86 pounds and measuring 3.5 inches in length and width with a 1.55-inch height, this plug is well-suited for industrial and commercial piping applications where corrosion resistance and mechanical strength are required. Licensed plumbers and pipefitters are the typical installers for this class of fitting.

This hex head plug fits into threaded female NPT connections on pipe flanges, valves, manifolds, or pipe headers in industrial, commercial, and mechanical system piping. The 304 stainless steel construction makes it appropriate for environments exposed to moisture, mild chemicals, or corrosive atmospheres where carbon steel fittings would be unsuitable. It is part of the SP-114 Fittings series and is classified under the Nipples and Fittings product category.

Key Features

• 3-inch male NPT thread for direct connection to standard female NPT fittings
• 304 stainless steel construction resists corrosion in wet and chemically active environments
• 150 lb pressure class rating suitable for standard industrial piping service
• Hex head drive pattern accepts standard pipe wrenches and hex sockets
• Cored design reduces material weight while maintaining structural integrity
• Compact profile: 3.5 x 3.5 x 1.55 inches overall dimensions

Compatibility

Designed as an OEM-style threaded pipe fitting compatible with standard 3-inch female NPT connections rated at 150 lb pressure class in industrial and commercial piping systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes such as the IPC or ASME B31.3. Shut off and depressurize the pipe system fully before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before engagement. Do not overtighten, as this can crack or distort stainless steel fittings.