Swagelok SS-12M0-3 — 316 stainless steel Swagelok tube fitting, union tee, 12 mm Tube OD. Body in 316 stainless steel with the Swagelok two-ferrule (front-ferrule/back-ferrule) mechanical-grip tube end for a gaugeable, leak-tight connection on instrumentation and fluid-system tubing (three 12 mm Swagelok tube fitting (two-ferrule) ends). Working pressure and temperature ratings are determined by the selected tubing per Swagelok catalog MS-01-140; use with correspondingly sized, fully annealed 316/316L stainless steel tubing.