(62)Tube fitting unions are straight thread fittings that have two tube fitting end connections to connect two pieces of tubing in a straight run. D-U_solidworks.jpg
(48)Duolok bulkhead unions are straight tube fittings designed to pass through a bulkhead or cabinet wall. They have two equal size tube fitting end connections and an extended threaded body designed to be secured the fitting to a bulkhead or cabinet wall with a bulkhead nut.D-BU_solidworks.jpg
(16)Bulkhead reducing unions are straight tube fittings that have unequall size tube fitting end connections and at threaded body designed to be secured in a bulkhead or cabinet with a bulkhead nut.D-BRU_solidworks.jpg