Thanks for the Info. From cburg's link: "There also are a lot of counterfeit AN bolts around. ... A look at the head of the bolt can reveal if it's a fake. There aren't many manufacturers of the real thing anymore, since the AN spec is obsolete for government-procurement purposes. The "X" on the head should be raised, not impressed into the head. The manufacturer's initials or logo must be on the head."
Note that there is a huge discussion about changing out #1DO AN abled bolts due to two events (one Helo and one gyro). Most guys have a percentage of these bolts on their machines, which are apparently NOT counterfeits (but could be).
I would follow these two threads much more info to come...
[QUOTE=Doug Riley;526716]For what it's worth, #01DO is registered by the U.S. Patent Office to Mac Fasteners of Ottawa, KS. They claim on their Website to be a "low-cost" manufacturer of aerospace fasteners. I'm not sure I want my heart surgeon to be the low bidder.
Mac's products certainly turn up everywhere; I just got a load of bolts from Wicks Aircraft with Mac's markings on them. My former student, Dan, has a 2004 Butterfly with the same markings on its pivot bolts.
Interestingly, Ernie Boyette uses Fasco Grade 8 bolts on his products. AN bolts, if made to spec, are roughly Grade 5. Grade 8 bolts are not, as sometimes alleged, brittle; they are simply stronger than Grade 5. I had a blade strike in my Dominator early on and the Grade 8 spindle bolt bent but didn't break.
Comments
Man that sucks.glad it happened on the ground.I didn't know there were corrupt an bolts out there that really sucks.you can't rely on anything
Thanks for the Info. From cburg's link: "There also are a lot of counterfeit AN bolts around. ... A look at the head of the bolt can reveal if it's a fake. There aren't many manufacturers of the real thing anymore, since the AN spec is obsolete for government-procurement purposes. The "X" on the head should be raised, not impressed into the head. The manufacturer's initials or logo must be on the head."
Note that there is a huge discussion about changing out #1DO AN abled bolts due to two events (one Helo and one gyro). Most guys have a percentage of these bolts on their machines, which are apparently NOT counterfeits (but could be).
I would follow these two threads much more info to come...
[QUOTE=Doug Riley;526716]For what it's worth, #01DO is registered by the U.S. Patent Office to Mac Fasteners of Ottawa, KS. They claim on their Website to be a "low-cost" manufacturer of aerospace fasteners. I'm not sure I want my heart surgeon to be the low bidder.
Mac's products certainly turn up everywhere; I just got a load of bolts from Wicks Aircraft with Mac's markings on them. My former student, Dan, has a 2004 Butterfly with the same markings on its pivot bolts.
Interestingly, Ernie Boyette uses Fasco Grade 8 bolts on his products. AN bolts, if made to spec, are roughly Grade 5. Grade 8 bolts are not, as sometimes alleged, brittle; they are simply stronger than Grade 5. I had a blade strike in my Dominator early on and the Grade 8 spindle bolt bent but didn't break.
The lab analysis will be telling.[/QUOTE]