Description Deck Filler Flip Up Key Stainless Steel 38mm Fuel Flush mount, lost wax cast, 316-grade stainless steel deck fillers. Unique flip up-key ensures ease of removal at all times. Features coarse thread, ‘O’ ring seal, retaining chain and filler type identification moulded into the lid. Flange: 75mm Protrusion: 6mm Intrusion: 75mm Mount Screws: 4mm c/s