This A-A-59326-compliant polypropylene dust cap has a female coupler connection with a four-inch coupling size. The coupling component is a socket with a DC coupling type and has a socket inside diameter of 4 3/4 inches. This dust cap can be used in general-purpose, food and beverage-based applications. Its working temperature is 0 Degrees F to 150 Degrees F, with a maximum operating pressure of 100 PSI.