The original are self tapping screws. I installed screws6 mm diameter, do not remember the length. Pay attention to the hole, the boat, in the locker is less large that on the deck.Drill the hole in the counter inox plate 1mm larger. But: mine is a 40 Cruiser 2008, on your boat you might have other dimensional problems. I used a Zucchini MS polymer, but the best is 3m 5200 fc (structural)