B K Mueller 580-001HC Black Close Nipple 1/8 Inch

Product Description

The B K Mueller Industries 580-001HC is a black steel close nipple sized for 1/8-inch pipe threads. A close nipple is threaded along its entire length with no unthreaded center section, making it the shortest possible nipple for a given pipe size. This fitting is used to connect two female-threaded fittings with minimal spacing between them. It is a standard pipe fitting installed by licensed plumbers, HVAC technicians, and gas fitters in both residential and light commercial applications. The black steel construction makes it appropriate for gas distribution piping where galvanized fittings are not permitted by code.

This close nipple is suited for low-pressure gas lines, air lines, and general black iron pipe assemblies. The 1/8-inch size is common in pilot gas supply lines, pressure gauge ports, and instrumentation taps. It is sold in a package of 10 units, making it practical for service contractors stocking fittings for routine installations and repairs.

Key Features

• Close-pattern nipple — fully threaded with no unthreaded center, minimizes assembly length
• 1/8-inch nominal pipe size with standard NPT threads
• Black steel construction suitable for gas piping per applicable codes
• Packaged in quantities of 10 for job-site or shop stocking
• Lightweight at 0.11 pounds per unit

Compatibility

Designed as a standard NPT close nipple for use in black iron pipe systems requiring 1/8-inch fittings. Compatible with any female 1/8-inch NPT threaded fitting or valve port in gas, air, or fluid piping assemblies.

Installation Notes

This fitting is typically installed by a licensed plumber or gas fitter. Before working on any gas or pressurized line, shut off the gas supply or depressurize the system and verify zero pressure with an appropriate gauge. Apply a code-approved thread sealant or PTFE tape rated for the service medium before assembly. Installations on gas piping must comply with IFGC or local applicable code requirements.