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12-02-2018, 04:27 PM
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Join Date: Nov 2017
Location: Orlando
Posts: 195
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Hi-loks, recommended sources
I need specific sizes/lengths. Does anyone have a recommended source? Let me know. Much thanks
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12-02-2018, 05:35 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by Freemasm
I need specific sizes/lengths.
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For what application????
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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12-02-2018, 07:48 PM
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Join Date: Nov 2017
Location: Orlando
Posts: 195
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Shear
All shear apps. so titanium, steel, 7075, lots of
options can be used. Replacing AD6s in the spar. Being ?out of order? will make bucking (more) difficult. I can provide part numbers (several would work)
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12-02-2018, 08:10 PM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,435
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I expect that gen-aircraft-hardware.com or skygeek.com will have them.
Dave
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12-03-2018, 04:38 AM
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Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 1,213
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KLX Aerospace
I work in the heavy aircraft overhaul business, and we currently use KLX Aerospace for most of our fastener procurement. My RV-4 is built with Titanium Hiloks in almost every location that an AN bolt of permanent installation was called out. I also used Titanium bolts in the other 99% of the locations, as well as Titanium reduced head screws for every panel, fairing ect. having been in the industry for 38 years, I have been able to get these items easily. I probably only saved a few pounds, but I am a huge fan of Hiloks and even took some to OSH years ago to talk with Van himself about his thoughts. For most folks, understanding a proper transition fit, precise hole reaming, pricing and the other associated installation quirks, Hiloks are less appealing.
__________________
Bill E.
RV-4/N76WE
8A7 / Advance NC
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12-03-2018, 06:17 AM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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A few years back a friend of mine who worked at an airline facility that was shut down gave me a half-full 5 gallon bucket of titanium NAS bolts of various lengths. Took me a while to sort thru them all but needless to say I have a lot of titanium bolts in my rocket.
__________________
Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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12-03-2018, 03:08 PM
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Join Date: Nov 2017
Location: Orlando
Posts: 195
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Thanks
Please keep the suggestions coming. Hi-loks are a great product. They were used on the Space Shuttle Heat Shields (and other places) in my early engineering days. Many times they were utilized without their dedicated collar but with standard MS locking nuts as a "one sided" fastener. Also used where low their profile heads provided an advantage. Replaced some huck bolts in certain certified aircraft with them many years ago but I can't remember where they were bought.
I will try gen-aircraft-hardware and KLX aerospace. Not a fan of skygeek.com. I think they are purchase/resale type of operation. Ordered some "in stock" firewall sealant from them then given a three week ship date after I'd paid. They still charged a "restock" fee so they will never make another dime from me (thread drift, sorry). As mentioned, please keep the suggestions coming.
Scott F
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12-03-2018, 03:16 PM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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eBay is another source of surplus hardware. I'm on the hunt now for a set of oversized Ti Hi-Loks for the wing center section in my Rocket. You may not get them all at once, but they don't go bad with age.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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12-03-2018, 03:30 PM
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Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
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FWIW, while the Ti 6-4 bolts are stronger and lighter, the nice feature of AN bolts is their ductility and much greater elongation to failure. for the limited number of bolts on an RV I don't believe the weight savings of Ti offset the durability of a AN bolt.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all
Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
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12-03-2018, 04:19 PM
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Join Date: Nov 2017
Location: Orlando
Posts: 195
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Yes and No
@Steve Melton. Thanks for your reply. Respectfully, I believe you're both right and wrong here. All rivets should be in shear application. Likewise, titanium should never be used in tension. When using something other than a rivet that swells to fill the hole in the stack, the structural integrity of the joint/assembly is assured by the diametrical close tolerance(s). The properties of ductility don't really come into play. Supporting evidence =
- the same fastener in shear application is typically torqued to ~45% of same in tension application (you can win some bar bets with that one).
- No Hi-lok pin material has inferior structural qualities to 2117 even after stain hardening.
They're also a great application for places for where a rivet gun can't go, as well.
I've been fortunate to work and know some very smart people. There's also a bunch here on VAF that will call BS on me where needed. Thanks for your reply.
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