[Healeys] [Mg-t] cars2 the movie

[Oudesluys]

It is not a question of better tolerances or better thread. In aviation 
the US standard threads are used as the US dominated aviation for so 
long, nuts and bolts are generally produced in UNF in aviation quality 
and rightly so to keep down production costs and uniformity of 
inspections and standards.
A similar thing happens to bolts for the attachment of seatbelt anchors. 
All over the world 7/16"UNF.
Kees Oudesluijs

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