"Bob Lowe" wrote in message oups.com...
Hi again- Apparently there is no standard 'Grade' for Aircraft hardware
such as bolts and nuts, only Aircraft 'Quality'. Does anyone know of any
'Standards' for this 'Quality'? The best that I can determine is that
each manufacture of Aircraft Quality Hardware have their own standards and
are not made to any 'Industry' standards. I have found out that some
manufactures will not even give a PSI rating for their nuts and bolts,
only stating that they are of 'Aircraft Quality'. Can anyone put more
light on this?
Thanks,


"national aerospace standard" or for short, "nas"

https://www.google.com/#q=nas%2Bmil%2Bspec%2Bfasteners