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  #71  
Old 09-18-2017, 11:33 AM
Draker's Avatar
Draker Draker is offline
 
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Location: Livermore, CA
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Quote:
Originally Posted by vernon smith View Post
Great catch, several months ago I purchased 100 7032TF2085 8-32 x .5 Torx flat head screws that were listed as 100 degree. I ordered the ones on the order form above more recently. I went to the same area on their web site and ordered the 6-32 assuming it would be 100 degree as well. I looked into it today and they do not list a 6-32 Torx 100 degree.


I sent them a note asking if 6-32 100 degree are available as well as a request for an RA. Now we will see how easy they are to deal with on returns
Yea, the reason I caught that was I was also looking around online for non-Philips (either Torx or allen head) screws and am typing these criteria over and over. 8-32 + Flat head + 100degree + Cadmium plated + longer than 1/2 inch seems like an extremely difficult if not impossible combination to find.
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  #72  
Old 09-18-2017, 08:41 PM
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vernon smith vernon smith is offline
 
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Microfastener lists them all the way down to 2-56. For their prices the source has to be China so all bets are off on quality. That's what I like about aames, you get aviation quality fasteners-at a ridiculously high price. However, usually what we are securing with a 6-32 screw is not life endangering if a failure occurs. From my experience with a Chinese fastener the failure will come with the original tightening, if at all. Usually the problem will be the Torx broached six point hole will strip out. In that case we are right back where we were with the Phillips

http://www.microfasteners.com/fcmxs0...stainless.html
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  #73  
Old 09-28-2017, 10:07 AM
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Thanks for the link to Microfasteners. Unfortunately they don't seem to have #8 screws longer than 1/2 inch. Was hoping to go with torx or allen heads to attach the capacitive plates inside my tanks, but those need to be at least 8R14. The search continues...
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  #74  
Old 09-28-2017, 10:17 AM
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RV7A Flyer RV7A Flyer is offline
 
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Originally Posted by Draker View Post
Was hoping to go with torx or allen heads to attach the capacitive plates inside my tanks
Um...why? Planning on putting them in and out a bunch of times? IIRC, I installed them once and then sealed up the tanks.
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  #75  
Old 09-28-2017, 04:18 PM
Bicyclops Bicyclops is offline
 
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McMaster Carr

https://www.mcmaster.com/#socket-hea...crews/=19l2kub

I like the black oxide ones.

Ed Holyoke
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  #76  
Old 09-28-2017, 07:28 PM
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Originally Posted by RV7A Flyer View Post
Um...why? Planning on putting them in and out a bunch of times? IIRC, I installed them once and then sealed up the tanks.
Mostly due to my stripping a few heads trying to drive them in at the angle they are. However reading some other tips here, the better solution to that looks like applying some boelube or wax to the thread and using a little patience. Probably makes more sense than using different screws.
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  #77  
Old 09-28-2017, 07:46 PM
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Low Pass Low Pass is offline
 
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Quote:
Originally Posted by maniago View Post
Those I see are stainless. SS on Al promotes galvanic corrosion in the presence of water.. Do you use them on the exterior of your ship or just interior? If exterior, how have you combated the corrosion issue?
I've been using stainless (austenitic) hex and Torx head screws for ~14, 15 years and they work just fine for a hangared plane. Every no 6, 8, and many of the non structural 10 screws in my plane comes from Micro Fasteners. Just make sure those few snug nutplates have been chased with a tap. That's maybe 1 out of 75-100. I do nothing special for galvanic corrosion except keep it out of the rain.
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Last edited by Low Pass : 09-28-2017 at 07:50 PM.
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  #78  
Old 09-28-2017, 07:52 PM
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vernon smith vernon smith is offline
 
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Quote:
Originally Posted by Bicyclops View Post
McMaster Carr

https://www.mcmaster.com/#socket-hea...crews/=19l2kub

I like the black oxide ones.

Ed Holyoke
These appear to all be 82 degree which is understandable, 100 degree is virtually unknown outside the aircraft industry. Few people are screwing together .016" sheets to .032 sheets and the like.
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  #79  
Old 09-28-2017, 08:57 PM
Bicyclops Bicyclops is offline
 
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Default Socket head screws

Somebody was asking about socket head screws. The link I posted was right to that page. McMaster is also a good source for wobble Allen driver bits.

I get my cad plated 100 degree countersunk screws from ACS and live with the Phillips head. Once they show any wear at all, I throw them away.

Ed Holyoke
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  #80  
Old 04-16-2018, 01:24 AM
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CubedRoot CubedRoot is offline
 
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I'm guessing that no one has been able to source 100 degree, flush head, torx fasteners for structural use, such as the fuel tank and inspection panels yet, have they?

I have browsed the micro fasteners website, but they are stainless screws, which are a bit softer than the AN screws Van's supplies. I am not sure I want my fuel tanks held on with them. McMaster only has 82 degree screws :-(
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