Get your chromatography equipment accessories from Grainger. Flangeless nuts eliminate the need to flange tubing and when used with a flangeless ferrule, you get a leak-free connection with FEP tubing. Simply insert the tubing through the nut, attach the ferrule (flat end towards the PTFE fitting) to the end of the tubing and finger tighten the nut into place. The ferrule is designed to form a zero dead-volume connection.
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