I rarely get stumped on a fastener. These look familar, I feel like I should know what they are, but I just can't quite put my finger on it. Help me feel a little less dumb and tell me what they go to. They are Jeep related (assumed since they are in with a zillion other Jeep related fasteners). OD is about 7/8". I can get the thread pitch if that helps. If you need them, I have about 10 or so.