Replace the fine thread drain plugs on any kayak with the Yak Gear Fine Thread. Drain plug threads vary between coarse and fine threads. The fine thread (black washer) is the perfect replacement part for the kayaker that knows that the missing plug is a fine thread drain plug. For a universal kit, to add or replace unknown styles of drain plugs, please see the complete Yak Gear Universal Drain Plug Kit. Drain plug comes with top flange. Installation hardware not included.