Midland Industries 66472 Hex Cap 3/8 in Fnpt Steel 150 Lb

Product Description

The MIDLAND INDUSTRIES 66472 is a steel hex cap fitting designed to close off the end of a female threaded pipe or fitting. It accepts a 3/8-18 FNPT connection and carries a 150 lb pressure class rating. The zinc-plated finish provides corrosion resistance for general-purpose piping applications. Rated for service from -20 to 350 degrees F, this cap suits a wide range of fluid and gas piping systems. Licensed plumbers, pipefitters, and gas service technicians typically install this type of fitting when capping unused branch outlets or temporarily sealing lines during system modifications.

This hex cap fits into galvanized steel piping systems used in residential and light commercial applications. It is commonly installed in water supply, gas distribution, and general plumbing lines where a threaded branch outlet needs to be closed. The 3/8 inch FNPT thread and hex drive design allow installation with a standard wrench. The compact profile keeps the fitting low-profile in tight spaces.

Key Features

• 3/8-18 FNPT internal thread for direct connection to male-threaded pipe ends
• 150 lb pressure class rating for general-purpose piping service
• Zinc-plated steel construction for corrosion resistance
• Rated from -20 to 350 degrees F for broad service compatibility
• Hex drive profile allows installation with a standard open-end or adjustable wrench
• Conforms to ASME B16.14 - 1991 dimension standards

Compatibility

Designed as an OEM-style replacement and general-use fitting for 3/8 inch FNPT galvanized steel pipe systems conforming to ASME B16.14 standards.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing and mechanical codes. Shut off and depressurize the line before installing or removing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before engagement. Do not over-tighten; use a wrench on the hex flats only and avoid applying force to the pipe body.