Ah yes the m4 nut , bolt and washer so bloody fiddly and they suggest the washer goes on the inside of the bracketA very common problem, together with the stupidly short securing screws that are often provided that you have to line up with tapped holes in s bracket. And do not get me started on floodlights that have a machine screw, 3 washers and a nut. This is something you have to assemble and secure while two storeys up on a ladder
There should be a LAW that the MD of any company, that makes light fittings, has to go up a ladder and fit one of his own lights!
But I'm not one to complain......