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  #11  
Old 01-14-2021, 06:57 PM
fgwilliams fgwilliams is offline
 
Join Date: Nov 2018
Location: Auburn, AL
Posts: 18
Default Found some too

I installed two like this on my port inspection plate. Didn’t find them until last night. I tested the replacements and found two more in the bag prior to riveting them on. Glad I tested them first... the second time.
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  #12  
Old 01-15-2021, 08:15 AM
stigaro stigaro is offline
 
Join Date: Aug 2020
Location: Ontario, Canada
Posts: 25
Default

I was about to post the EXACT same thing today! I too found a couple nutplates without threads and of course, found them AFTER I finished riveting them in place. I was wondering how common this problem is. My -14A empennage kit was delivered in late Sept 2020. Perhaps Van's got a bad batch?
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  #13  
Old 01-15-2021, 10:51 AM
Warden Warden is offline
 
Join Date: Nov 2013
Location: Mid Michigan
Posts: 18
Default

Quote:
Originally Posted by fixnflyguy View Post
You can tap it, but it wont be locking then. I have tapped them and put fastener in with locktite. Be sure they are correct starting hole size for the tap. I'm pretty sure they are rolled threads from MFG, then "crushed" for the locking feature.
You can tap it with a Spirolock tap to have the self-locking feature.
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  #14  
Old 01-15-2021, 02:09 PM
BruceW BruceW is offline
 
Join Date: Aug 2005
Location: Elk Grove, CA
Posts: 145
Default

Chinese manufacture ???
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  #15  
Old 01-15-2021, 07:15 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,760
Default

I've never found one that was not threaded. If I did, I would catch it during my install process because I use a short screw with a jam nut on it as kind of a holder, assures that it is centered in the (tight) clearance hole.

I position the plate nut with a cleco, then put the short screw in by hand until it gets tight at the locking squeeze. Then I spin the jam nut down on to the skin to keep the plate nut pulled up tight. Then the second attach hole is ready to rivet.

Aside from insuring that the plate nut lines up with the clearance hole, this process would immediately detect one that didn't get threaded.
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  #16  
Old 01-16-2021, 12:51 AM
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DrillBit DrillBit is offline
 
Join Date: Nov 2007
Location: Pleasanton, CA
Posts: 195
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Quote:
Originally Posted by scsmith View Post
I've never found one that was not threaded. If I did, I would catch it during my install process because I use a short screw with a jam nut on it as kind of a holder, assures that it is centered in the (tight) clearance hole.

I position the plate nut with a cleco, then put the short screw in by hand until it gets tight at the locking squeeze. Then I spin the jam nut down on to the skin to keep the plate nut pulled up tight. Then the second attach hole is ready to rivet.

Aside from insuring that the plate nut lines up with the clearance hole, this process would immediately detect one that didn't get threaded.
Used this method since I found out on my very first nutplate install that the threads don't necessarily align with the clearance hole if one of the rivets gets squozen more than few mrad off plumb.
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  #17  
Old 01-16-2021, 01:27 AM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 7,164
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Quote:
Originally Posted by DrillBit View Post
Used this method since I found out on my very first nutplate install that the threads don't necessarily align with the clearance hole if one of the rivets gets squozen more than few mrad off plumb.
+2. Me too, Maybe this is a west coast thing?
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  #18  
Old 01-16-2021, 05:04 AM
dwmillsap dwmillsap is offline
 
Join Date: Jul 2010
Location: Winterville NC
Posts: 40
Default

If they put threads in ALL of them, it takes the “sport” out of building.
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  #19  
Old 01-16-2021, 05:28 AM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
Posts: 1,921
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Quote:
Originally Posted by stigaro View Post
I was wondering how common this problem is. My -14A empennage kit was delivered in late Sept 2020. Perhaps Van's got a bad batch?
Nutplates without threads go back to the Wright Brothers (OK, slight exaggeration). Experienced builders check every nutplate before installing them. The problem will be eliminated when they get robots to make the nutplates.
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Last edited by Captain Avgas : 01-16-2021 at 05:34 AM.
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  #20  
Old 01-16-2021, 02:27 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
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Quote:
Originally Posted by DrillBit View Post
Used this method since I found out on my very first nutplate install that the threads don't necessarily align with the clearance hole if one of the rivets gets squozen more than few mrad off plumb.
Yes, true!

Also remember that in many places, the screws are supposed to carry shear through an assembly of parts, and it does this by bearing on the sides of the hole. If you open up the clearance hole so the screw goes in easily, then it is not transmitting shear properly, and you have only clamping friction left to do that -- not a good plan for shear strength.
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