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The HAM-LET 3001546 is a compression tube insert designed to reinforce tubing ends in compression fitting assemblies. This insert fits inside the tube at the point of connection, preventing tube deformation under ferrule compression and maintaining a reliable, leak-free seal. Constructed from 316 stainless steel, it meets ASTM A182, ASTM A213, ASTM A269, ASTM A276, and ASTM A479 material standards, as well as DIN EN10122-5 and DIN EN10272. It is a small but critical component installed by plumbers, HVAC technicians, and instrumentation technicians working with compression fittings in fluid and gas handling systems.
This insert is suited for use in residential and commercial plumbing, HVAC, and industrial instrumentation applications where soft or thin-wall tubing requires internal support at compression joints. The inside diameter is 0.1875 inches, and the end connections are Tube O.D. x Tube I.D., making it appropriate for inline tube-to-tube compression fitting configurations. It is commonly used wherever tube wall integrity under compression load is a concern, particularly in systems handling corrosive media that benefit from 316 stainless steel construction. The Swagelok equivalent reference part number is SS-405-3.
Designed as an OEM-style compression tube insert compatible with compression fitting assemblies requiring internal tube support; cross-references Swagelok part number SS-405-3.
Installation is typically performed by licensed plumbers or instrumentation technicians. Before servicing any compression fitting, depressurize the line and isolate the section being worked on. The insert should be seated fully inside the tube end before assembly into the fitting body. Follow applicable IPC or system-specific procedures for compression fitting assembly torque and leak testing.
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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