Have a annoying tick coming from passenger side....Noticed one bolt missing...Looked up parts online and all came back as 3/8 inch - 16x 3/4 inch. I pulled one out and brought to the store with me...looked like a perfect match. Tried to screw it in and it screws a little and stops. it feel like it will strip the hole if i force it...I screwed the old one back in and it went in easy....is there some header bolt trick that i dont know about? or a slight size dimension im not getting? thanks in advance....