A screwdriver assembly includes a screwdriver shaft and an insert. The screwdriver shaft extends longitudinally from a proximal end to a distal end and having a longitudinal channel extending therethrough. The insert has a longitudinal shaft received within the longitudinal channel and a distal end extending distally relative to the distal end of the screwdriver shaft. The insert shaft is rotatable relative to the screwdriver shaft. The distal end of the insert is sized and shaped to engage a head of a screw. The distal end of the insert is disengaged from the screw bead by rotating the insert relative to the screwdriver shaft.

A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance.

Discussed is a bolting device that effectively protects an internal configuration of a battery pack and increases manufacturing efficiency during a bolting operation. The bolting device for manufacturing a battery pack includes an electric screwdriver provided with a rotation motor; a driver bit connected to the rotation motor to enable a rotation movement and configured to rotate a bolt; a bit guide member provided with a hollow tube such that the driver bit is inserted into an inside of the hollow tube to be movable; and a guide jig provided with a main body configured to be mounted on an upper portion of a pack housing, the main body having a plate shape and having at least one through hole, and a fixing member inserted into the through hole and mounted therein, and having an insertion hole.

An improved open-ended wrench that is adaptable for engaging hexagonal head nuts with non-specific engagement surfaces. The wrench provides a handle with an open working end having opposed flat jaw working surfaces with a positional work piece engagement cavity there between. A contact enabling contoured notch cutout in each flat inside working surface with corresponding standard and non-standard support and torque engagement surface respectively inwardly from the junction of the concave cavity portion.

A device for the automatic manufacture of screw connections by a screw includes a motion system with which the screw can be led to the components to be connected. The screw is taken up by an automatic screwing arranged on the motion system. A protective sleeve is arranged so that it can be moved with the automatic screwing unit. The protective sleeve acts as protection, surrounds the screw, and is arranged out of contact with one of the components to be connected.

A driver for non-magnetic gripping of a socketed fastener head. The driver includes a shank and two cantilever beams. Each cantilever beam has an end and a basal segment adjacent the shank opposite the end. The driver also includes a gap defined by the two cantilever beams in resting positions. The gap extends between the two cantilever beams from an open end toward the shank. The ends of the two cantilever beams are configured to bend into the gap from the resting positions.

A blind bolt and tool is used for fastening a bolt through a hole in a structure when only one side of the structure is accessible. A receiver is formed on the tip end of a bolt shaft opposite from a bolt head. Internal threads are formed within the receiver proximate an outward end, and a hex socket is formed in the inward end of the receiver. External threads and a guide are formed on a tip of the tool, and the external threads mate with the internal threads in the receiver to hold the bolt during installation. A hex key on one end of the tool engages the hex socket in the receiver so that the tool may impose a torque on the bolt when a nut is being tightened on the bolt. In another embodiment, a splined tip is formed on the end of the bolt. The tip is designed to shear off when a sufficient torque is applied. Also, a shim is configured to fit between structures held together by the blind bolt.

A fastener device is disclosed. The fastener device includes a hub defining a bore, an attachment shank including a proximal stop and distal bit received within the bore, a retainer releasably engagable with a proximal end of the hub and a defining a passageway for a proximal mounting end of the attachment shank, a biasing element engaged with the proximal stop, and a split cam assembly disposed within a distal end of the bore. The split cam assembly is biased toward a closed configuration for engaging and retaining the head of a fastener, and is piovtable upon distal advancement of the attachment shank and distal bit, against the head, to release the head from engagement with the split cam assembly.

A screw bit body which allows for efficient torque force application onto a socket fastener from a variety of angles. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a concave surface, a convex surface, and an engagement cavity. The convex surface is adjacent to the first base and the concave surface is adjacent to the second base to create a ball-like shape. The engagement cavity creates a gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the concave surface and the convex surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base.

A driver for non-magnetic gripping of a socketed fastener head. The driver includes a shank and two cantilever beams. Each cantilever beam has an end and a basal segment adjacent the shank opposite the end. The driver also includes a gap defined by the two cantilever beams in resting positions. The gap extends between the two cantilever beams from an open end toward the shank. The ends of the two cantilever beams are configured to bend into the gap from the resting positions.