On Jan 4, 10:12*am, "Stuart & Kathryn Fields" wrote:
Well, *I use 4 of these bolts in the "Jesus" bolt position whose job is to
keep my my entire rotor blade system from departing like a kids toy. *Yes, I
want *to be 500' in the air not even wondering if I got the bolts that I
thought I did.

Stu"Maxwell" wrote in message

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"cavelamb himself" wrote in message
...
wrote:
On Jan 3, 2:45 pm, "Stuart & Kathryn Fields" wrote:

Recent quote for 16 of these bolts was about $20.00 each!! *Anyone out
there
with a less expensive source?

Since I presume you're dealing with an experimental aircraft, and a
MS20074 bolt is a coarse thread (the only coarse thread aircraft
structural bolt I know of), 125 ksi, drilled head hex bolt, why not
just use a grade 5 or grade 8 auto bolt? They are quite good quality
if you buy from the right source. Try some of the race car suppliers
maybe.

Regards,
Bud

It might be quite good quality - or it might be junk.

How are you going to know???

If you go with a quailty manufacturer that will certify the grade, specify
rolled threads, and have them individually magnafluxed, you should be good
to go.- Hide quoted text -

- Show quoted text -

I agree that I would want top quality for the "Jesus" nut as we used
to call them. I also agree with the others that I wouldn't complain
about $80 for them. Not the place to try and save money in my opinion.
As for not knowing what you have, ARP makes bolts for racing cars that
are made to the same AMS (aerospace metallurgical standard) specs as
aircraft. I doubt that they will be any cheaper however. They make big
end rod bolts to 300 ksi using Aermet 100, the strongest structural
metal available. They probably cost as much or more as any MS bolt. As
I said, MS20074 bolts are only 125,000 psi strength bolts, and since
they are coarse thread, are not as strong as an AN bolt in tension.

http://www.arp-bolts.com/

Regards,
Bud