Is this a hood emblem? What car is it for? Thank you!

[L. Wall]

I am unable to find another one of these online.  I am unsure what vehicle this is for.  I appreciate any help on this.

[Craig Gillingham]

It looks like an early Mack truck logo.

 

[Ozstatman]

2 hours ago, L. Wall said:

I

Is that a left hand thread? Or is the image reversed?

[Mark Wetherbee]

It’s the screw portion of a 3-piece hood ornament - radiator cap. The cap would have a through hole and a separate T-nut underneath which would stop on a post hanging off the bottom of the cap itself. It goes into a radiator neck with two notches and as you tighten it the nut turns slightly to stop on the post and you keep turning the part you have until the radiator is sealed.  When you loosen it the nut stops again after turning loose enough to hit the post and it is again aligned with the slotted radiator neck. On the truck in the picture it goes on the radiator which is behind the hood, and Craig’s right that it’s from an early Mack “Bulldog” which was produced by the International Motor Company in New York, hence the IM logo.