Does anyone know the bolt size for the outer lower Air Dam bolts?

Hello, does any one know what size bolts are used on the outer bolts of where the air dam bolts to the bumper. The body shop apparently forgot to put them back, when they did a bumper/headlight repair. Yes I am planning to go down there and try to get them to replace them and try to get the fit better for the bumper and headlight (but that's another issue). Since I cannot get there until later in the week at earliest I may just put the bolts in or at the minimum at least have the parts number and make sure they use the right size and not throw whatever they have laying around and strip or damage something.

I think they should be part #29 on the diagram but they do not list a part number. I have attached a picture of the spot they go as well.

 

think 17mm been a couple years since I took it off

 

Any appropriate sized pan head screw will work I would think a short #8 or #10

 

I don't think that is a air-dam bolt. The air-dam goes around that bolt ...maybe #5 or #6 for the lower valance.

 

looks like the bumper cover bolt.....
you dont need the chin strap any way, pull it off