The lid can be locked on the filler neck with a padlock. The filling cover is normally delivered with a gasket. This secures that the filling cover is tight when the lid is mounted.
Material: Zink DS 7030 ZnAl4Cu1 Reducer: AlMgSi 1.0 (glued on with Loctite 577) Gasket: DPI-UNI Thread for 52 mm hoseadapter DS 41 Thread: Pipethread G DS/ISO 228/1