Swagelok M-400-3 is a Monel Alloy 400/R-405 three-port union tee for 1/4 in. tube OD, part of Swagelok’s Monel tube fittings family. The union tee configuration provides three 1/4 in. OD tube connections in a single compact body, enabling assembly and disassembly without disturbing adjacent tubing and helping maintain leak integrity across all three runs. The M-400-3 designation identifies Alloy 400/R-405 construction, and Navy approvals exist for Alloy 400/405 Swagelok tube fittings in the 1/4 in. through 1 in. OD range, including 1/4 in. fittings.
