B K Mueller 582-040HN Black Steel Pipe Nipple 3/8x4

Product Description

The B K Mueller Industries 582-040HN is a black steel pipe nipple measuring 3/8 inch in diameter by 4 inches in length. Pipe nipples serve as short threaded connectors used to join two pipe fittings, valves, or threaded ports in a piping system. This nipple is finished in black iron, making it suitable for gas supply lines, compressed air systems, and general low-pressure fluid applications. Licensed plumbers, pipefitters, and HVAC technicians routinely install fittings of this type during rough-in and service work. The 3/8 inch nominal size fits standard NPT-threaded components in that diameter class.

This black pipe nipple is commonly used in residential and light commercial installations where threaded black iron pipe assemblies are required. Typical applications include natural gas distribution piping, propane supply lines, and compressed air drops. The 4-inch close-to-close length provides a short extension between fittings where a close nipple or hex nipple would be too short. This fitting is sold in a package quantity of five, making it practical for multi-point installations or service stock.

Key Features

• 3/8 inch nominal diameter with 4 inch end-to-end length
• Black iron finish suitable for gas and compressed air service
• Standard NPT threading for compatibility with threaded fittings and valves
• Sold in a package quantity of 5 pieces
• Unit of measure is EA for individual piece pricing and inventory

Compatibility

Designed as a standard-thread replacement or new-installation fitting for 3/8 inch NPT threaded piping systems, including black iron gas and compressed air assemblies.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, the International Fuel Gas Code (IFGC), or the International Plumbing Code (IPC) depending on the service. Always shut off and depressurize the gas or fluid supply before disassembling or extending any threaded pipe system. Apply an approved thread sealant or PTFE tape rated for the intended service to all NPT connections before assembly. Do not overtighten threaded fittings, as this can crack or deform the fitting body.