B K Mueller 583-040HN Black Pipe Nipple 1/2x4 in 20 Pack

Product Description

The B K Mueller Industries 583-040HN is a black steel pipe nipple sized at 1/2 inch diameter by 4 inches in length. Pipe nipples are short threaded pipe sections used to connect fittings, valves, and equipment in gas and liquid distribution systems. This nipple ships in a package of 20 units, making it practical for contractors and service techs who install multiple connections per job. The black finish is standard for gas line applications and is commonly specified in residential and light commercial piping systems where galvanized or chrome finishes are not required.

This nipple is suited for residential and commercial gas distribution, fire sprinkler rough-in, and general plumbing applications where a close or short extension between fittings is needed. Plumbers, pipefitters, and HVAC technicians commonly use black pipe nipples when connecting gas appliances, boilers, unit heaters, and similar equipment. The 4-inch length provides a short but workable extension between threaded components in tight installations.

Key Features

• 1/2 inch diameter by 4 inch length — standard short-extension sizing
• Black steel finish suited for gas line and general piping applications
• Threaded ends for direct connection to standard NPT fittings and valves
• Package quantity of 20 units supports multi-connection installations
• Consistent with common residential and light commercial piping specs

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for 1/2 inch NPT threaded gas and liquid piping systems in residential and light commercial installations.

Installation Notes

Black pipe nipples are installed by licensed plumbers, pipefitters, and HVAC technicians. Shut off gas supply or isolate the water system before breaking any existing connections. Apply an approved pipe thread sealant or PTFE tape rated for the service medium — confirm gas compatibility when used on fuel gas lines. Work must comply with applicable local codes, IFGC, and IPC requirements.