IDEX Super Flangeless Fitting system is an ideal choice those connections that need to be broken frequently and tubing assemblies because they swage onto the tubing. The nut is manufactured from biocompatible PEEK and delivers excellent chemical resistance. It comes with a Tefzel (ETFE) ferrule and stainless steel locking ring. IDEX fitting has a 5/16-24 Flat-Bottom thread port configuration and is for 1/8"OD tubing. IDEX fitting systems comes with a P-359 Super Flangeless Ferrule.