Product Information Material: Brass Thread: Pipe, Straight Select a Product Part NumberThread SizeTube SizeWorking Pressure 172C-04021/8", 7/16"-241/4"300 PSI 172C-08063/8", 11/16"-201/2"200 PSI 172C-04041/4", 7/16"-241/4"300 PSI 172C-06041/4", 9/16"-243/8"200 PSI 172C-06063/8", 9/16"-243/8"200 PSI 172C-06021/8", 9/16"-243/8"200 PSI 172C-03021/8", 3/8"-243/16"400 PSI 172C-02021/8", 5/16"-241/8"400 PSI