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The MIDLAND INDUSTRIES 44701LF is a lead-free bronze hex locknut rated for 1/4 inch FPT connections. Built to ANSI B16.15 dimensional standards, this fitting carries a 125 pressure class rating and measures 0.66 inches across the hex and 1/4 inch in thickness. Lead-free bronze construction makes it suitable for potable water applications and meets current regulatory requirements for plumbing fittings. Plumbers, pipefitters, and mechanical contractors use this locknut to secure threaded pipe connections in a wide range of service conditions.
This locknut is rated for use in steam, water, gas, oil, and air service, making it a versatile choice for residential and commercial plumbing, HVAC piping, and light industrial systems. The FPT thread pattern follows standard tapered female pipe thread sizing, allowing straightforward integration into existing piping assemblies. The bronze material provides corrosion resistance in both wet and dry service environments.
Designed as an OEM-style replacement or new-installation hex locknut for 1/4 inch FPT threaded pipe connections in steam, water, gas, oil, and air service applications conforming to ANSI B16.15 standards.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ANSI standards. Shut off and depressurize the line completely before removing or installing any threaded fittings. Use an appropriately sized hex wrench or open-end wrench on the 0.66 inch hex to avoid rounding. Apply thread sealant or tape appropriate for the intended service medium before making up the connection.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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