Sea Dog Deck Fill, Gas. These Hose Deck Fills with Splash Guards feature a cap attachment chain and easy-to-use tabs for key-less operation (no deck plate key required). Cap diameter 1-11/16", thread pitch 12 SAE. Fits 1-1/2" ID hose. Constructed of corrosion resistant investment cast 316 stainless steel. Installs with three #10 FH fasteners (not included). USCG regulations require bonding wire to prevent sparking. Gasket sold separately (351349).