Kimble-Chase* Kontes* Chromatography Ferrules

Flangeless fittings eliminate the need to flange (flare) PTFE tubing to make a connection. Just slide a flangeless ferrule onto the tubing, conical end toward the male nut, and finger tighten. Flangeless fittings can be used with all flat bottom 1/4-28, 5/16-24 and M6 threads.
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Flangeless ferrules
Use for: Use with 420821-Series Male Nuts