Description Deck Filler Flip Up Key Stainless Steel 50mm Diesel 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: 81mm Protrusion: 4mm Intrusion: 95mm Mount Screws: 4mm c/s