box mounting bolt loose

had this noise, heavier than a rattle.. found that the passenger side mounting bolt for the box is loose,, closest one to the cab,, fyi

 

any pictures of said bolt? I hear my bed rattling when going over gravel - might be the same?

 

Mine does this as well the bolt Isn't lose on mine the hole in the fiberglass has ob-longed allowing for the bed to move. come to think of it, its been quiet since I got the tool box in my truck. Probably has enough weight to keep the box from moving around

 

fixed my box rattle today,, took bolt out, there is a metal sleave that the bolt goes threw..so you cant over titen the bolt and cause damage to box,, BUT.. the sleave was higher than the box,, took grinder and shaved the top of sleave off just alittle below the box,, reinstalled bolt, no more loose. rattley box,,