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-   -   Screws for wingtips (http://www.vansairforce.com/community/showthread.php?t=103268)

jay.pearlman 08-18-2013 09:11 AM

Screws for wingtips
 
I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?

Fred.Stucklen 08-18-2013 09:16 AM

Screws for wingtips
 
I used 6-32 srews in the provided hole locations. My wingtips are also gas tanks (9.5 gals each). I've not seen any indications of tip movement.

Quote:

Originally Posted by jay.pearlman (Post 798974)
I am mounting the wingtips. The plans say either screws (removable) or rivets. I need to make it removable because antennae and lights are mounted in the tip. The choice of screws seems to be 6-32 or 8-32. Which size screws have you used? Why the choice?


aerhed 08-18-2013 09:21 AM

Eights are tough because they're so near the edge you get a wavy skin. Bigger heads are hard to get flush also. Some guys have used fours, but I hate fours because they strip or snap so easily. So.....sixes, I guess.

Stoo 08-18-2013 10:23 AM

I used the Cleaveland kit with 4-40 screws.


http://www.cleavelandtool.com/Stainl...ctinfo/WHS220/

Stewart Willoughby
6, finishing

wjnmd 08-18-2013 10:34 AM

Cleaveland wingtip kit
 
I used the Cleaveland wingtip kit but I also used Click-Bond nutplates that are cemented to the wingtip with a two part epoxy. Easy to install and easy to remove if necessary.

instructor_bill 08-18-2013 11:02 AM

Quote:

Originally Posted by Stoo (Post 798994)
I used the Cleaveland kit with 4-40 screws.


http://www.cleavelandtool.com/Stainl...ctinfo/WHS220/

Stewart Willoughby
6, finishing

then also go to microfasteners.com and buy #4 torx screws and you have a really nice, low stripping solution.

I found that the screws that came with the cleveland tool kit stripped very easily. I tried everything including flattening the tip on a high quality new screw driver tip to get a deeper bite in the screw head-- still stripped.

torx is the way to go.

Walt 08-18-2013 11:02 AM

I agree, #6 are the best here.

RV7Guy 08-18-2013 11:41 AM

Don't use 4-40's!!!
 
I would definitely not use 4-40's they are simply too small and the screw heads are easy to strip out. I did one wing tip with these and removed and replaced with 6-32. Better grip and MUCH cheaper. I can't recall any other 4-40's in the construction.

Regarding Torx, I don't get the fascination with them. You gain no advantage over Phillips. Now you have to carry a few extra Torx and the proper wrench.

Remember to use the back up metal strips when you attach the nut plates to the glass.

Joe 08-18-2013 11:51 AM

6-32 for me ...
 
I hate to sound like a clueless "me too-er" but I like many others, I used 6-32's.

It was easy to make the decision: weigh a bag of seventy-eight (!) 6-32 screws and nutplates and weigh a bag of 8-32s <g>.

I've had no issues with the smaller screw heads using proper techniques (Boelube on initial installation, good #2 Phillips bit).

--
Joe

scard 08-18-2013 12:38 PM

Our current airplane has 4-40 torx. I'm not going to do that again. Next one has 6-32 phillips.


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