Tapping screws form mating threads in materials they are driven into. There are two basic types: thread forming and thread cutting. The thread-forming screw displaced material around the pilot hole so ...

The bolts holes are stripped and damaged on this Caterpillar D9T Bulldozer transmission cover! Someone has also tried to repair one of the holes using a self tapping thread repair insert but the hole ...

Like it or not, Detroit's going metric. New-design engines, chassis, and drivetrains are in most instances entirely metric. Older engines and chassis may have a combination of both standard (English) ...