Midland Industries 111-6 Hex Locknut 3/8 in Npsl Brass

Product Description

The MIDLAND INDUSTRIES 111-6 is a brass hex locknut designed for 3/8-inch NPSL threaded pipe connections. Locknuts of this type are used to secure conduit, pipe, and fittings to enclosures, panels, or adapter bodies by threading onto the pipe end and tightening against the surface. This fitting is rated to 1200 psi and carries a service temperature range of -65 to 250 degrees F, making it suitable for a broad range of plumbing and mechanical applications. The hex profile measures 1 inch across flats, allowing installation and removal with a standard wrench. Licensed plumbers, pipefitters, and HVAC technicians typically handle this type of fitting during system assembly and service.

This locknut is designed for use with brass, bronze, copper, steel, aluminum, and iron pipe in residential and commercial installations. With a 3/8-18 thread size and NPSL connection type, it fits standard straight-thread locknut applications where a secure mechanical connection to a panel or enclosure wall is required. The 0.31-inch thickness provides a positive seating surface when tightened. Its brass construction resists corrosion in both wet and dry service environments, making it a dependable choice across a wide range of piping systems.

Key Features

• Brass construction for corrosion resistance in wet and dry service environments
• Rated to 1200 psi for use in demanding pressure applications
• Service temperature range of -65 to 250 degrees F
• 1 inch hex profile for wrench installation and removal
• Compatible with brass, bronze, copper, steel, aluminum, and iron pipe
• 3/8-18 thread size with NPSL connection type

Compatibility

Designed for use with brass, bronze, copper, steel, aluminum, and iron pipe where a 3/8-inch NPSL hex locknut is required.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter using an appropriately sized open-end or adjustable wrench on the 1-inch hex profile. Shut off and depressurize the relevant pipe or system before making or breaking any threaded connections. Apply thread sealant or tape as appropriate to the connection type and service medium. Ensure threads are clean and undamaged before assembly to achieve the rated pressure seal.