Left Picture - Sometimes when mounting accessories with multiple attachments points it's a real pain to get a few of the bolts started if things don't quite line up. I trick I use is to thread a nut on the bolt & grind at least a 7mm long taper on the end down to a dull point. (a new longer bolt may be needed). Thread off the nut. Now when you insert the bolt, push to help align it with the hole while turning.
Right 2 Pictures - If you have a hole with slightly damaged or dirty threads and you do not have the correct tap you can make up a cheap thread chaser from a bolt of the correct size. Using a file you can cut a longitudinal V channel at the end of the bolt. You need to ensure that the 90 degree edge is leading in the direction of travel. The back edge of the travel gives the chips somewhere to go.
Right 2 Pictures - If you have a hole with slightly damaged or dirty threads and you do not have the correct tap you can make up a cheap thread chaser from a bolt of the correct size. Using a file you can cut a longitudinal V channel at the end of the bolt. You need to ensure that the 90 degree edge is leading in the direction of travel. The back edge of the travel gives the chips somewhere to go.
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