The part looks to me to possibly be a propellor hub for a 3 bladed propellor. As to what plane it is from I have no idea. There is a photo here of what is identifed as a B-17 hub still attached to the front part of an engine.
https://www.flickr.com/photos/lojjic/848801594
You can see some "similarities", but yours does not appear to be the same.
If you could get the dimensions on your part or identify some markings it might be possible to narrow the search.