Swagelok SS-600-61 gaugeable 316 stainless steel tube fitting — bulkhead union, 3/8 in. tube OD. Body in 316 stainless steel with Swagelok two-ferrule (back-ferrule/front-ferrule) mechanical grip end connections for a leak-tight, gaugeable connection on instrumentation and fluid-system tubing. End connections: 3/8 in. Swagelok tube fitting × 3/8 in. Swagelok tube fitting. Bored through: Yes. Supplied with Standard Cleaning and Packaging (SC-10). 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.