inktoxicated

ok. heres the deal. when i got my stereo installed i used old 4 g wire to come off the distrubtuin blocks to go to the batt/ground. today i got my 0 gauge wire in. i ran the wire the same way as the 4 gauge, even tho it was a bear because it was so thick. hooked up the new wire/ring terminal to the oem ground post. same as where the 4 gauge was. I cross threaded the freakN nut i was torquing down and then it just gave way... now the oem ground bolt/post is stripped and i cant even ground the car there. i had to use a similiar bolt/post a few inchs away from the main ground.its a hair smaller CAN I FIX THIS POST/BOLT? I dont feel comfortable with the stuff grounded to the other one

inktoxicated

edit.
fixed it. simple die cut new threads. had me scared for a minute i had the car grounded to a suspicious bolt