B K Mueller 581-050HN Black Pipe Nipple 1/4 X 5 Inches

Product Description

The B K Mueller Industries 581-050HN is a black steel pipe nipple designed for use in low-pressure piping systems across residential and light commercial applications. Measuring 0.25 inches in diameter and 5 inches in length, this close-cut threaded nipple serves as a rigid connector between pipe fittings, valves, and equipment in gas, air, and non-potable fluid distribution systems. Plumbers, pipefitters, and HVAC technicians routinely use black steel nipples to fabricate or repair gas supply lines and compressed air manifolds. This SKU ships in a package quantity of 10, making it practical for service vans and job-site inventory.

Black steel pipe nipples of this size are a standard component in residential gas piping rough-in work, including connections to furnaces, boilers, water heaters, and gas appliances. The 0.25-inch diameter is commonly used for branch lines and appliance drops where flow demand is modest. The 5-inch length provides clearance for offset connections and valve installation without requiring a union or additional fittings. This part is suited for both new construction and service-replacement work.

Key Features

• Black steel construction for use in gas and air piping applications
• 0.25-inch nominal diameter with NPT threads on both ends
• 5-inch overall length for offset and valve-clearance installations
• Packaged in quantities of 10 per unit for efficient restocking
• Threaded ends ready for immediate assembly with standard NPT fittings

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for residential and light commercial gas and air piping systems using 0.25-inch NPT threaded connections.

Installation Notes

Installation of black steel gas pipe nipples should be performed by a licensed plumber or pipefitter in accordance with local codes and IFGC requirements. Shut off the gas supply and verify zero pressure before disassembling any existing piping. Apply an approved pipe thread sealant or PTFE tape rated for gas service to all male threads before assembly. Pressure-test the completed assembly before restoring gas service.