Midland Industries 44710LFUSA Hex Locknut 3 Inch Npsl

Product Description

The MIDLAND INDUSTRIES 44710LFUSA is a 3-inch hex locknut manufactured from lead-free bronze, designed to secure threaded pipe connections in fluid and gas distribution systems. It features an NPSL (National Pipe Straight Locknut) thread form, which is the standard straight thread used on locknut applications. Rated at a 125 pressure class and dimensioned to ANSI B16.15 standards, this fitting delivers consistent, code-compliant performance across a wide range of service types. It is installed by licensed plumbers, pipefitters, and HVAC technicians in both residential and commercial piping systems.

This hex locknut is approved for use in steam, water, gas, oil, and air service applications, making it a versatile fitting for mechanical, plumbing, and HVAC installations. The lead-free bronze construction meets modern potable-water and environmental compliance requirements. It is sourced and manufactured in the USA, placing it within Midland Industries' USA Lead-Free Bronze Fittings product line. Typical use cases include securing pipe penetrations through panels, enclosures, or fixture connections where a locking thread engagement is required.

Key Features

• 3-inch NPSL straight thread form for standard locknut applications
• Lead-free bronze construction meets current potable-water and environmental regulations
• Rated 125 pressure class per ANSI B16.15 dimensional standards
• Approved for steam, water, gas, oil, and air service
• USA manufactured within Midland Industries' lead-free bronze fittings line
• Hex profile allows standard wrench installation and tightening

Compatibility

Designed for use in steam, water, gas, oil, and air service piping systems requiring a 3-inch NPSL hex locknut. Dimensioned to ANSI B16.15 standards for compatibility with fittings meeting the same specification.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and standards such as the IPC or IFGC. Shut off and depressurize the line before removing or installing any fitting. Use an appropriately sized open-end or adjustable wrench on the hex faces to avoid deforming the fitting. Do not overtighten or use pipe wrenches directly on the body without proper protection.