B K Mueller 581-020HN Black Pipe Nipple 0.25x2 in 10 Pack

Product Description

The B K Mueller Industries 581-020HN is a black iron pipe nipple sized at 0.25 inches by 2 inches, sold in a package of 10. Black iron pipe nipples are short threaded pipe sections used to join fittings, valves, and other pipe components in gas distribution and general plumbing systems. Plumbers, pipefitters, and gas technicians use these nipples to make up close connections between threaded components where a longer run of pipe is not needed. The black finish indicates untreated carbon steel, which is the standard material for natural gas and propane supply lines in residential and light commercial installations.

This nipple is commonly used in residential and commercial gas piping systems, including connections at appliances, manifolds, and shutoff valves. The 0.25-inch nominal pipe size suits branch lines, pilot supply connections, and other low-flow applications. The 2-inch body length provides enough thread engagement on both ends while keeping the installed assembly compact. Plumbers and HVAC technicians also use black nipples in steam heating systems and certain industrial fluid handling lines where galvanized or copper fittings are not appropriate.

Key Features

• 0.25-inch nominal pipe size with standard NPT threads on both ends
• 2-inch body length for compact close connections between fittings and valves
• Black iron carbon steel construction standard for gas supply piping
• Sold in a package quantity of 10 units for job-site efficiency
• Each is unit-of-measure priced individually (EA) within the 10-pack

Compatibility

Designed as a standard NPT-threaded black iron pipe nipple suitable for use with 0.25-inch threaded fittings, valves, and couplings in gas and general piping applications.

Installation Notes

Installation of black iron gas pipe nipples must be performed by a licensed plumber or gas fitter in accordance with local codes and the International Fuel Gas Code (IFGC). Shut off the gas supply and verify pressure is relieved before breaking any threaded connection. Apply an appropriate pipe thread sealant or tape rated for gas service to all male threads before assembly. Inspect all joints for leaks after restoring pressure using an approved leak detection solution.