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The CAMBRIDGE RESOURCES fnb34x5 is a black steel Schedule 40 pipe nipple used to create threaded connections in gas, steam, and water distribution systems. Sized at 3/4 inches by 5 inches, it is manufactured to ASTM A733 specifications and hydrostatically tested to verify pressure integrity before leaving the factory. Plumbers, pipefitters, and mechanical contractors install this type of nipple when assembling or extending threaded pipe runs in residential and commercial applications. The black steel construction is well suited for gas supply lines and steam systems where galvanized fittings are not required or preferred.
This nipple is used in Schedule 40 threaded piping systems across a broad range of mechanical applications, including natural gas distribution, steam heating, and general industrial pipe runs. Its 3/4-inch nominal diameter and 5-inch length make it a common choice for close-quarter connections and riser extensions where a standard close nipple or hex nipple would be too short. Installation is typically performed by licensed plumbers or pipefitters in both new construction and retrofit work.
Designed as an OEM-style replacement or standard component for Schedule 40 threaded black steel piping systems using 3/4-inch NPT fittings.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the International Plumbing Code or International Fuel Gas Code. Shut off and depressurize the piping system fully before removing or installing any threaded nipple. Apply an appropriate thread sealant or PTFE tape rated for the intended service medium before making up the joint. Do not over-torque threaded connections, as this can damage threads or cause stress cracking in connected fittings.
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