How do you re-thread a bolt hole?

To re-thread a bolt hole, first clean the hole of any debris or old threads using a wire brush or tap cleaner. Then, select the appropriate tap size and type for the bolt you're working with. Insert the tap into the hole and turn it clockwise, applying steady pressure while ensuring it stays straight; use cutting oil for lubrication if necessary. Once the new threads are formed, remove the tap and clean the area again before inserting the bolt.