Originally Posted by GTO JUDGE

Hey jon.... Welcome to the forum.

Not sure what double ended screws you need, there are none.
Mounting the front facia:
This is the mounting hardware that comes with the Kit:

Front fascia Extension qty: 1
License plate bracket qty: 1
Pushpins qty: 4
Rivets qty: 2
U-clips qty: 2
screws qty: 2

You will also need 2 sided tape.

The rivets go with the license plate bracket and are drilled into the bumper.
The lower grille is molded into the fascia.

The double sided tape is located on the top edge of the fascia.
The 4 push pins are located on the underside of the front fascia. 1/8" holes are drilled then enlarged to 1/4" for the push pins to press into to secure the bottom of the fascia to the bumper.

The 2 pan head screws are located; one on each side of the front lower fender well. They secure the sides in the fender well.

I have no idea what the U-clips are for, there is no mention of them in the assy process, I am assuming they are for the license plate application.

That is all the hardware there is. There is no double ended screws.

Kind of a long winded answer to your question but I hope the overview will help you.

The push pins are 1/4" in dia. As far as length, you can measure the total thickness of the bumper and fascia and buy accordingly. You may be able to find push pins at a hardware store.

Some time ago there were directions on line for a permanent installment of the front fascia. This encompasses pop riveting it on from behind the bumper and there is what is called a "newly developed attaching screw" There is no further details on that screw but it looks like it screws into a hole and the other end appears to be a rivet.