I forgot to tighten down the alternator bottom bolt and nut and drove the vehicle for about 50 miles. Then I suddenly noticed my rpm and cruise control wasn't working so I pulled over and noticed the alternator belt was loose. When I checked the lower bracket, the bolt and nut was missing. I would like to get the dimensions/size of the bracket bolt and nut so I can get a like one at home depot if that's possible.

Thanks.