This OEM Coarse Threaded Plug suits Wilderness Systems, Dagger, Perception and Wavesport Kayaks that come with a drainage bung Plug Hole moulded in. It will also fit some Hobie and Heritage models
It is designed to screw into the coarse threads moulded into the hull of the boat and does not fit models with a separate Female Threaded part.
Super simple solution- Just push it it in and screw just make sure the threads match- which it will if it is one of these brands.
It can also fit into a simple drilled hole approximately 5/8 in. to 11/16 in., depending on deck material but this is at your own risk. The Plug is equipped with a retention clip to keep it from getting lost. Coarsely Threaded.