King Combination Nipples (KC Nipples) have various means of transitioning from hose to pipe, adapters, valves or strainers, these connections are for fluid transportation.
Ground Joint Male Spuds can be used to connect female ground joint hose couplings to threaded manifolds, valves, and equipment. Thread the NPT side to any pipe threaded connection and then swivel a female ground joint wing nut onto the other end.