... /4", 11/2", 2 , 21/2", 3", 4", 5", 6" Adaptor x Female NPT/BSPT Used in a wide varietyof applications ... firmly in place assuring proper placement .(3)Smooth face of groove and great resistance to vibration .(4) Working pressure is 1 ... .Packing: International seaworthy packaging, or according to customers' requirements. cam & groove coupling