Some of the time, chasing the thread works great and it’s simple. All you do is thread the tap into the damaged bolt hole to straighten the threads. If it holds the specific torque rating, job done.

You've drawn a 4x5.5 bolt hole pattern. Change the number of holes on your circle to six, at 12, 2, 4, 6, 8, and 10 on a clock face, and you have a 6x5.5 bolt pattern, just like the new-style Ram ...

You've drawn a 4x5.5 bolt hole pattern. Change the number of holes on your circle to six, at 12, 2, 4, 6, 8, and 10 on a clock face, and you have a 6x5.5 bolt pattern, just like the new-style Ram ...

For seven-lug wheels, measure from the center of one hole to the center of the farthest hole, skipping the two adjacent holes on each side (diagram C)—then multiply by "1.03." ...

Removing broken bolts can be one of the most challenging workshop tasks, especially when standard extractors fail. This video ...

UniWest's US-1518 ScanDex is designed to help inspectors position an eddy current bolt hole probe into the hole by keeping the eddy current coil parallel to the hole. This should help the coil ...

Ames Pontiac 389/400/455 Motor Mount Adapters: How to Interchange Early and Late Pontiac V-8 Blocks with Two, Three, or Five Engine Mounting Bolt-Holes Per Side.

However, by using a tapered drift pin (seen in one of the forward holes) we were able to align every hole for the proper 3/8-16 bolt. All it takes is a little patience and prying. See All 20 Photos ...