Midland Industries 63664 Solid Hex Head Plug 3/4 Mpt Ss

Product Description

The MIDLAND INDUSTRIES 63664 is a solid hex head plug designed to seal threaded pipe openings in pressurized systems. Rated at 150 lb pressure class and manufactured from 316 stainless steel, this plug delivers corrosion resistance well beyond standard carbon steel fittings. The 3/4-14 male pipe thread (MPT) connection conforms to ASME B1.20.1 thread standards, ensuring consistent fit and reliable sealing across compatible piping systems. The hex head design accepts a standard wrench for controlled installation torque. Plumbers, pipefitters, and mechanical contractors working on process and utility piping will find this plug suited for a range of media applications.

This plug is rated for use with air, water, oil, natural gas, and steam media, making it appropriate for both commercial and light industrial piping applications. Typical use cases include capping unused branch outlets, blanking off test ports, and closing open tees or crosses during system commissioning or modification. The 316 stainless steel construction makes it a preferred choice in environments where moisture, mild chemicals, or corrosive atmospheres are present, such as commercial kitchens, marine-adjacent facilities, and outdoor mechanical rooms.

Key Features

• 316 stainless steel construction for superior corrosion resistance over 304 SS and carbon steel
• 3/4-14 MPT thread conforming to ASME B1.20.1 dimensional standards
• 150 lb pressure class rating suitable for standard service piping
• Hex head design for positive wrench engagement during installation and removal
• Compatible with air, water, oil, natural gas, and steam media
• Compact profile: 1.05 inches in length, 1.15 inches in width, 1 inch in height

Compatibility

Designed for use with 150 lb class threaded pipe fittings and valves accepting a 3/4 inch MPT connection. Compatible media include air, water, oil, natural gas, and steam per manufacturer specification.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable mechanical and plumbing codes. Depressurize and drain the line completely before removing any existing fitting or installing this plug. Apply an appropriate thread sealant or PTFE tape to the male threads before tightening; do not overtighten, as stainless steel threads are susceptible to galling. Verify system pressure and media compatibility before returning the line to service.