L/C & L/O Headbolt
Left bolt = spec bolt i use today 12.9 M12 1,5 *90 (insex)
middle bolt = std headbolt  from my L/O  10.9 M12 1,5*90 (torx)
right bolt = new std headbolt Peugeot 304 94-95   10.9 M12 1,5 *110 (torx)