Kayak Drain Plug Sea Dog Single One single coarsely threaded replacement screw plug, by SeaLect Designs. Replace a lost drain plug on your kayak. The Sea Dog drain plug is a common size and thread shape. This plug set can easily be used to replace a lost drain plug on most kayaks. Often fits into a base plate mounted on the kayak. Store in USA , Arrive 5-14 days Base is not included with this plug.