Abstract: A fastener joint tightening apparatus with an inertia canceling unit is disclosed for tightening a threaded fastener joint using a power tool driven by an electric motor, including a tool adapter for engaging a rotating member of the tool, a bit adapter for engaging a bit for tightening a threaded fastener, and a torsional spring mounted between the tool and bit adapters to dampen torsional torque during fastener tightening.

Abstract: An apparatus for mounting and locking a keylocking insert in a threaded opening in a parent material includes a driver adapted for sequential mutual and relative rotation with the insert, drive means for rotationally driving the driver in response to a force applied thereto, and a press for operating the keys into a locking position. The driver has a threaded stud for threadably engaging interior threads of the insert to mount the insert in the parent material by threadably engaging the insert exterior thread with the threaded opening and advancing the external thread into the threaded opening in response to the mutual rotation of the driver. The press has a first end surface for engaging the keys of the insert and longitudinally moving toward the insert to operate the keys to the locking position in response to the relative rotation of the driver. The insert is thereby both mounted and locked by rotation of the driver.