B K Mueller 580-040HC Black Pipe Nipple 1/8 X 4 Inch

Product Description

The B K Mueller Industries 580-040HC is a black steel pipe nipple sized at 1/8 inch nominal diameter by 4 inches in length. Pipe nipples are short sections of threaded pipe used to connect fittings, valves, and equipment in piping assemblies. This nipple features male NPT threads on both ends, allowing it to bridge two female-threaded components in a straight run. It is a standard close-to-long fitting used in gas distribution, water supply, compressed air, and general industrial piping. Plumbers, pipefitters, and HVAC technicians regularly install this type of fitting during new construction and service work on low-pressure systems.

This 1/8 inch black nipple is suited for residential and light commercial applications where a small-bore connection is required. Common uses include pilot gas supply lines, pressure gauge ports, instrument taps, and low-volume gas branch connections. The black steel finish indicates an uncoated carbon steel construction typical for gas service rather than potable water lines. It ships in a package quantity of 10 units, making it practical for contractors stocking their service vans or supply rooms.

Key Features

• 1/8 inch nominal NPT threaded both ends for standard pipe connections
• 4 inch length provides adequate reach for offset or extended connections
• Black steel construction appropriate for natural gas and propane service
• Sold in a package of 10 for convenient contractor stocking
• Standard close-nipple geometry compatible with common pipe fittings and valves

Compatibility

Designed as an OEM-style replacement and standard trade fitting for 1/8 inch NPT threaded piping systems in gas, air, and industrial fluid applications.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable codes such as the IFGC or IPC. Always shut off the gas or fluid supply and relieve system pressure before making or breaking any threaded connections. Apply an appropriate thread sealant or PTFE tape rated for the service medium before threading the nipple into fittings. Do not over-torque small-diameter nipples, as this can crack fittings or distort threads.