B K/mueller Inds(import) 588-040HN Black Pipe Nipple 2x4

Product Description

The B K/MUELLER INDS(IMPORT) 588-040HN is a black steel pipe nipple designed for connecting sections of threaded pipe in gas, air, and fluid distribution systems. Measuring 2 inches in diameter and 4 inches in length, this close-cut nipple provides a reliable threaded connection point between fittings, valves, and pipe runs. The black iron finish makes it a standard choice for natural gas and propane distribution piping. Licensed plumbers, gas fitters, and pipefitters routinely use nipples of this type when building or extending threaded pipe assemblies in both residential and light commercial applications.

This nipple is suited for use in interior gas piping systems, compressed air lines, and other non-potable fluid distribution runs where black iron pipe is specified. It fits standard NPT-threaded fittings and valves. The 4-inch length makes it useful in tight runs where a close nipple is too short but a longer pipe section would be excessive. Installers working on furnace gas supply lines, unit heater feeds, or similar systems will find this a commonly stocked fitting size.

Key Features

• 2-inch nominal diameter with standard NPT threads for compatibility with common black iron fittings
• 4-inch overall length suits tight installation runs and offset connections
• Black iron finish appropriate for gas distribution and compressed air piping
• Sold in a package quantity of 4 units per package

Compatibility

Designed as an OEM-style replacement and standard stocking fitting for threaded black iron pipe systems using 2-inch nominal NPT connections.

Installation Notes

Installation should be performed by a licensed plumber or gas fitter in accordance with applicable local codes, the International Fuel Gas Code (IFGC), or the International Plumbing Code (IPC). Shut off the gas or fluid supply and relieve system pressure before making or breaking any threaded connections. Apply an approved pipe thread sealant or PTFE tape rated for the intended service medium. Inspect threads for damage before assembly and do not overtighten, as this can crack fittings or distort threads.