This cam-lock Type D is made of 316 stainless steel that is corrosion- and environmental element-resistant with a nitrile, extreme-temperature-resistant gasket. The connection is NPT. The coupling size and hose fitting size are 1 1/2 inches while the thread size is 1 1/2". This connector can withstand a maximum working pressure of 250 PSI at 70 Degrees F.