Reply #16: Actually, I have changed my mind. I think it is a 757 part.

[spooked911]

The reason I was having problems with matching this piece before was that I was looking at the wrong piece. Look at the landing gear in the factory photo BEHIND the gear the man is holding. I just realized that the top structure of the read landing gear is very different from the top structure on the landing gear that the man is holding.

In the part the man is holding, the trunion link is clearly jutting out quite a bit from the head unit. But in the part in the back, the trunion link is much more flush with the main trunk of the landing gear, which is the way the pentagon piece is configured.

Thus, the landing gear in the pentagon does seem to match the landing gear shown in the back of the photo.

Thus, this piece would strongly indicate a 757 hit the pentagon.

Or if one was desperate to cling to the idea that something else hit the pentagon, one could say this piece was planted somehow. I do find that idea very improbable.