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The HAM-LET 3600002 is a brass back ferrule designed for compression tube fittings with a 3mm tube outside diameter. The back ferrule is the rear sealing component in a two-ferrule compression fitting assembly, working in conjunction with the front ferrule to grip and seal tubing when the fitting nut is tightened. It is used in instrumentation, fluid handling, and process piping applications where leak-tight, repeatable tube connections are required. Licensed plumbers, pipefitters, and instrumentation technicians are the primary installers of this component.
This back ferrule is suited for small-bore tubing applications in both residential and commercial settings, including instrumentation lines, pneumatic controls, hydraulic panels, and analytical equipment. Its 3mm tube OD sizing makes it appropriate for precision tubing runs where compact fittings are required. It is sold individually and must be ordered in a minimum quantity of 5 units.
Designed for use in standard two-ferrule compression fitting assemblies with 3mm tube outside diameter tubing. Cross-references to Swagelok part number B-3M4-1.
Installation is typically performed by licensed pipefitters or instrumentation technicians in accordance with applicable plumbing and process piping codes. Shut off system pressure and depressurize all lines before disassembling or replacing ferrule components. Ferrules should not be reused once a fitting has been fully made up, as the ferrule deforms permanently to the tubing during initial assembly. Use appropriate tube preparation tools to ensure a square, clean tube end before insertion into the fitting body.
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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