Midland Industries 44707LF Hex Locknut 1-1/2 in Fpt Bronze

Product Description

The MIDLAND INDUSTRIES 44707LF is a lead-free bronze hex locknut designed to secure threaded fittings and prevent loosening in piping systems handling steam, water, gas, oil, and air service. The 1-1/2 inch FPT connection threads onto standard male-threaded pipe or fittings, providing a firm, vibration-resistant lock. At 2.12 inches across the hex flats and 0.47 inches in thickness, it seats flush and allows standard wrench engagement without excessive torque buildup. The lead-free bronze construction meets material requirements for potable water applications and holds up to the 125 pressure class rating defined under ANSI B16.15. Licensed plumbers and pipefitters are the primary installers for this type of fitting.

This locknut is suited for residential and commercial plumbing, HVAC hydronic piping, and light industrial piping where a secure threaded connection is required. Its multi-service compatibility makes it appropriate for steam distribution lines, compressed air lines, gas distribution piping, fuel oil systems, and domestic water supply. The FPT threading engages standard NPT male threads, making it a common stock item for service technicians and contractors who need a reliable, code-compliant locking fastener across a range of fluid and gas handling applications.

Key Features

• Lead-free bronze construction suitable for potable water contact and multi-service use
• 1-1/2 inch FPT connection compatible with standard NPT male threads
• 2.12 inch hex flat dimension allows engagement with standard pipe wrenches or adjustable wrenches
• 0.47 inch thickness provides a solid locking seat without excessive stack height
• Rated to 125 pressure class per ANSI B16.15 dimensional standards
• Rated for steam, water, gas, oil, and compressed air service

Compatibility

Rated for use with steam, water, gas, oil, and air service piping systems. Dimensioned to ANSI B16.15 standards for lead-free bronze fittings with a 1-1/2 inch FPT connection.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter following applicable local plumbing codes and ANSI standards. Shut off and depressurize the line completely before disassembling or installing any threaded fittings. Use an appropriately sized wrench on the hex flats to avoid rounding. Apply thread sealant or tape appropriate to the service type before threading onto mating NPT fittings.