replying to Bob Lowe, Bob Lowe wrote:
Bob Lowe wrote:

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,


Hi - Richard, You asked what am I trying to do. Well this can be a multi
fold answer. First of all, I am trying to learn. I use to own an
airplane and I would just buy a bolt without really know what I was
buying. I didn't take the time to determine what may be better - I just
took other peoples word for it as this is not too uncommon, right. For
the last few years I have been drawing hundreds of pictures of a different
Gyrocotors and I thought maybe, just maybe, I could find time to build a
simple one. I use to look at the four fire-wall engine mounting bolts of
my plane and think, if I were doing this I sure would have used heavier
looking bolts. And as you may surmise, I should surely understand the
strength of a bolt to get anywhere with this. Even if I should buy a
'kit' I know that I would be tempted to use a better bolt. And I thought
that I had better learn all I can on just what a better bolt may be. And
then I am always making things out of surplus Mil-spec bolts as stock,
mostly of stainless on my lathe, and again, it would be better to learn
more about what I may be using. I am retired now and I find myself trying
to learn the things that I didn't have the time to do before. That about
covers 'what I am trying to do' Richard...thanks for your curiosity.

Bob Lowe

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