I have had really bad rattle up front and i found out that it is my accesory bracket. One of the torx screws must have worked its way out because it is no longer there and that is where the rattle is. Does anyone know the correct bolt for this spot. I know the thread size because I pulled one of the lower ones but it is much longer with a 1" or so shank on it.

 

should be 3/8-16

 

Do you know the length by chance. I found a spare bolt with the same thread but it was to long.

 

Use the bolt you have to figure it out. Stick the bolt in the hole till it hits the threads, mark it where the bracket is. Measure the distance from the end of the bolt to your mark, add from 3/8-1/2" to the length. Thats the size.
Its probably ~1 1/2"

 

I usually use a toothpick or a stick or something. Jam it in there, mark where it sticks out, meaure it, and take off about a quarter inch (since blind holes aren't tapped all the way to the bottom).

 

Yea I tried that but to no avail. The threads are to far deep the and the other bolts on the bracket do not reach them. I will try the toothpick method that MikeS suggested.

 

Or just use a bolt that gets you 3/4 to an inch of threads into the threaded hole. The first few threads hold most of the tension by far anyways. There is no rule that says you have to use the entire threaded depth of the hole.

 

That's good advice. As a general rule, the strongest bolted joints use twice the diameter of the thread for engagement depth. More depth is O.K., but really no stronger. Less depth sacrifices load bearing strength.

Following that, a 3/8" bolt should have a minimum 3/4" of penetration into the base material. A 1/4" bolt should have at least 1/2" penetration, etcetera.