fastener, most certainly NOT, in my experience!
Engineers choosy - you must be having a laugh!
And as for Sillysod Sid, wrong group (those weren't Anni-Frid Lyngstad or Agnetha Fältskog in the photo) - and wrong country. As anyone with a pulse would know, ABBA was a Swedish group (although Anni-Frid was Norwegian, fathered by a married German officer during WW2).
Kids of today, mumble, dribble.......NURSE!!!