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Typhoon H Bolt to secure top and bottom shells spec?

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Does anyone know the specification for the 1cm long, socket head bolts that hold the top and bottom shells of the Typhoon H together? I suspect they are M2 X 10mm. Need to order some more online.
Thanks!
 
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h-elsner

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This is not metric thread nor other kind of screws for metal thread. It is some kind of Thread Forming Screws For Plastics with 1,5mm hexa drive. Sorry, I don't know the exact name or specification.

Ask YuneecSkins, maybe he can help

br HE
 
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OK, then these (see link below) should work.
The screws mentioned above have a much broader and deeper thread pitch; therefore they probably work very well, but then you can't go back to the original.
So I'll try these, and let you all know.
M2 assortment on Amazon

UPDATE: The thread pitch on these is wrong. Just buy the correct ones from Yuneec Skins! Here's the link again:
Top Shell screws for Typhoon H
 
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DoomMeister

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These are the proper screws. They are 2mmX7.8mm with a 1.5mm hex socket head. The thread is is much like a wood screw with a higher pitch and slightly deeper thread than a machine screw. With this threading into plastic I don’t think a machine screw is going to maintain the necessary structural integrity. It will strip out the plastic much easier.
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That is why i recommended the 2m self tapping use them all the time on DJI and Yuneec
 

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DoomMeister

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That is why i recommended the 2m self tapping use them all the time on DJI and Yuneec
I agree with your choice. The major difference being the pointed end for self tapping. This is a good replacement in my opinion.

Machine screws work well in threaded metal, but the thread pitch is too fine for plastic and wood.
 
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Some of the higher priced quads like DJI Inspire use metal threaded insert so I use the machine screws when required
 
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Just a heads up. Screws like those are notorious for stripping out the plastic where they are used. Once removed, you should always clean / dust off the screw threads to get rid of the excess plastic, then when screwing them back in, carefully back them out until you feel a slight click. This is how I know I'm probably aligned with the original threads. If they go in hard the second time they are probably cross threaded and gouging out the mount.
 
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DoomMeister

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Good point!!!

I do this with all types of screws. Just a habit I got into when I started working with fine thread machine screws in the intricate mechanical assemblies of circuit board manufacturing equipment.
 
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As a journyman Tool and Die maker 40 years ago I learned to use bar soap as a simple lube on all threads that are not thread locked. Works well on these also. I agree allways go forward and backup a little befor next turn.
 
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These are the proper screws. They are 2mmX7.8mm with a 1.5mm hex socket head. The thread is is much like a wood screw with a higher pitch and slightly deeper thread than a machine screw. With this threading into plastic I don’t think a machine screw is going to maintain the necessary structural integrity. It will strip out the plastic much easier.
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Thanks! Now, where do I buy them?
 

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