I have this bicycle given by me by a friend, I kept adjusting the height of the bicycle saddle for different members of my family and now the sides of the nut are rounded.
The nut is used to adjust the height of the bicycle saddle using a range.
I believe that the bolt is a carriage bolt? Now I am trying to find what size the nut is and the thread which I don’t understand.
Anyone know where I can buy the same nut online? Please tell me if the pictures aren’t clear, I’m still waiting to use the bike.