Tube to Male Pipe (UMC) Tube to Female Pipe (UFC) Tube Union (UU) Tube to Male Pipe 90° Elbow (UME) Tube to Female Pipe 90° Elbow (UFE) Tube to Tube Union 90° Elbow (UEU) Tube Male Pipe Branch Tee (UMBT) Tube Female Pipe Branch Tee (UFBT) Tube Union Tee (UUT) Tube Union Cross (UUC)