Terrin Caudle

ive got an issue with my driver side bolt.. a while ago i was driving down the road and *POOF* bolt goes flying off.. just now ended up buying a new one and i wen tto install it and it wont screw in?.. it will just wobble around. is there something on the underside of where it goes that im missing? anyone have any information? pictures of the underside? im lost and want to know how i can fix it right before i just jb weld into place and hope it works.