A one-piece fitting is more convenient and less cumbersome, since the ferrule cannot stick in a receiving port and the fitting is more easily found if dropped. With two-piece Fingertight, you only replace the ferrule instead of the entire unit, making these Fingertight more economical than the one-piece version.
Our original Two-Piece Fingertight Fittings were designed exclusively for 1/16nOD tubing. We now offer optional ferrules for connecting 1/32nOD and 190 um OD tubing with any Fingertight nut on last page. Our M-215 conductive perfluorelastomer ferrule is designed for mass spectrometer electrospray applications