I recently bought a toilet seat and the seat holder on one side loses over time making it loose from one side while another side is tight. I realised I was missing one these and hex Nut to fight it. I was wondering if the holder is loose because of the following
- Hex nut too tight it
- The displayed cover to cover the hex nut
I am new at this and wanted to find out about how do I determine the nut sizes? As the one I tried on the screw are too big or small. I am a layman at DIY so what is the best way to determine which nut goes on the screw? and if the attached image of the cover is needed or optional?