When access to the rear of a panel is restricted or the top surface of a tank is in poor condition the fixing ring will be beneficial. Fixing rings can be specified for all Aero filler caps, as an optional extra.
The 'C' type with a stainless steel thread inserts usually for panel fit, but can be used in a tank with sealant on the screw threads. The 'C' design allows the fix ring to be passed through the filler cap hole in the tank or panel.
The 'S' type solid design has blind threads and is intended to weld flush to a tank surface giving a perfect fitting platform. It can also be placed inside the tank so as to sandwich the tank material between the flange and the fixing ring.
We also offer a plastic lightweight fixing ring with the Aero 300.