I think the mystery question is whether they will consider the pin part long enough to be a "weapon". If it's held on with two piece friction pins like some medals (or ear rings), or Chicago screws it likely would not be a problem.

I remember when things first started we heard about fingernail clippers, and just about anything with a point, being considered possible weapons, and subject to confiscation. I'm not sure if they have let up on that level of scrutiny or not. You would hate to get all the way to the security point and have them give you the option of "leave it or don't get on the plane".

A phone call to someone may be in order to avoid last minute problems. Or, put it in checked baggage and not worry about it.

Good luck!