Midland Industries 28604W Hex Head Plug 1/2 in Mpt Nylon

Product Description

The MIDLAND INDUSTRIES 28604W is a hex head plug designed to cap off open male pipe thread (MPT) ports in low-pressure piping systems. Molded from nylon, this plug offers corrosion resistance and lightweight performance where metal fittings are not required. It carries a 1/2-14 thread designation with a 1/2-inch MPT connection and is rated for a working pressure of 125 PSI. The temperature range runs from -40 degrees F to 200 degrees F, making it suitable for a broad range of service conditions. Plumbers and pipefitters install this fitting when blanking off unused ports during system construction, maintenance, or testing.

This hex head plug is used in residential and light commercial plumbing, irrigation, and fluid-handling applications where a plastic fitting is acceptable. The hex head profile accepts a standard wrench for consistent, leak-free tightening without the need for specialized tooling. It is well suited for capping branch tees, manifold ports, and distribution lines in plastic piping assemblies where the 125 PSI pressure class meets system design requirements.

Key Features

• 1/2-inch MPT connection size with 1/2-14 thread form
• Nylon construction provides corrosion resistance and reduced weight
• 125 PSI pressure rating suitable for low-pressure service
• Operating temperature range of -40 degrees F to 200 degrees F
• Hex head design allows wrench installation for secure seating
• White finish for easy visual identification in plastic piping systems

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/2-inch MPT plastic piping systems rated at 125 PSI or below.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters following applicable IPC and local plumbing code requirements. Shut down system pressure and relieve any residual pressure before removing or installing fittings. Use a wrench on the hex head to achieve a snug fit - avoid overtightening nylon fittings, as excessive torque can crack the body. Thread sealant tape or compound compatible with nylon is recommended to ensure a leak-free seal.