Abstract: A U-shaped tube end connector for use on a horizontal shell and tube heat exchanger with the U-shaped tube end connector having close centerline-to-centerline capability and being molded from transparent plastic or cast stainless steel with built in O-ring type sealing gasket that eliminates the need for cumbersome space consuming special clamps by allowing for the bolting of the molded U-shaped tube end connector directly onto the face of a tube sheet on the heat exchanger vessel.