Chosen Solution
Are the iPhone 6s pentalobe screws compatible with the iPhone 6? I just tried with 6S screws on the iPhone 6 and they went right thru and could be screwed indefinitely without tightening. When i looked at the 2 screw holes on the screen assemblies i noticed that the holes were bigger on the 6 compared to the 6S. I have read that the 6s and 6 uses the same screws, so maybe this is a issue with my third party screen? So do they use the exact same type/size of screws?
Yep, I’ve mixed and match from the 5 to the 8 plus.
The screw holes are not always perfectly alined on the displays, especially if it’s an aftermarket screen. Try to bend them towards the bottom of the phone carefully, they might snap off if you’re not careful.
The sews from your “iPhone 6s” should work with all phone above the iPhone 3. I recently got a iPhone X and I can tell you the the sews are the same size and length as the iPhone 6 and 6s.