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The BRENNAN BI-00046 is a brass compression tube back ferrule designed for use in compression fitting assemblies. The back ferrule seats behind the front ferrule in a standard two-ferrule compression fitting, creating a secure mechanical grip on the tubing as the fitting nut is tightened. Machined from brass, this ferrule is suited for fluid and gas line applications where a reliable, leak-resistant tube connection is required. It is sold in packages of 10 and is compatible with 1/2 inch outside diameter tubing. Plumbers, pipefitters, and instrumentation technicians install this type of fitting component in both industrial and commercial systems.
This back ferrule is intended for use in compression fitting assemblies on 1/2 inch OD tubing runs. Typical applications include hydraulic lines, pneumatic systems, instrumentation tubing, and general-purpose fluid handling systems. The compression cap end connection style makes it appropriate for termination or cap-off points within a tubing assembly. It is commonly used in commercial mechanical rooms, process piping, and instrumentation control panels where tube fittings require a positive metal-to-metal seal.
Designed as an OEM-style replacement back ferrule for standard two-ferrule compression fitting systems using 1/2 inch OD tubing. Cross-references to Swagelok part number B-814-1.
Installation is performed by licensed plumbers, pipefitters, or qualified instrumentation technicians. Depressurize and isolate the tubing system completely before disassembling any compression fitting. Back ferrules are single-use components on initial installation and should not be reused once swaged onto tubing. Follow the fitting manufacturer's assembly procedure for proper ferrule seating and nut torque sequence.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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