Beckson 5 Twist-Out Deck Plate This Beckson 5 Twist-Out Deck Plate is designed so that the cover plate will conceal the mounting fasteners under the cover. With three separate sealing areas, this plate is designed to chase water away from the plate opening to ensure a watertight closure. This plate also features bayonet threads that are non-jamming, self-cleaning, and lift the center for easy removal. Features Three Separate Sealing Areas Mounting Fasteners Watertight Closure Bayonet Threads Non