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 fastening system including a pin member and a key for engaging the pin member. The pin member includes a shank portion and a recess formed within an end face of the shank portion. The recess includes a plurality of splines and recesses that form first and second bearing surfaces oriented at angles. The key includes a key head having a plurality of splines and grooves that form first and second bearing surfaces oriented at angles. The plurality of splines and recesses of the pin member and the plurality of splines and recesses of the key are adapted to communicate with each other when tightening and loosening the pin member.

The present disclosure provides a multiple use threaded fastener having a plurality of redundant locking features. The fastener includes a threaded hollow lock bolt having a tapered internal wall constructed to threadingly engage a threaded aperture in a housing. A threaded lock stud having a tapered external wall is constructed to fit at least partially within the hollow lock bolt and threadingly engage the threaded aperture of the housing and engage the tapered wall of the hollow lock bolt.

A device for attaching an object on a rail of a support is provided. The device includes a base designed to bear on the rail, and a device for tightening the base on the rail. The tightening device includes a threaded rod and a nut. A first end of the tightening device includes a tightening heel designed to be placed below the rail to tighten the rail between the heel and the base. A second end of the tightening device includes an element for maneuvering by an operator to tighten/loosen the device. The device can further include a detachable non-return device to prevent any involuntary loosening of the device.

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 step bolt connector and bolt assembly creates steps on a structure for accommodating a worker's boot. A first threaded bore is formed in a cylindrical end of a step bolt connector and this first threaded bore is threaded onto an exposed bolt on a structure. A sight hole extends from the exterior of the connector to the inward end of the first threaded bore for visually checking to see if the bolt is adequately attached in the first bore. A recess is formed in the cylindrical end and the recess is dimensioned to fit over fastening nut on the exposed bolt on the structure. When the first threaded bore is screwed onto the exposed bolts on the structure, the recess at least partially surrounds shields and protects the fastening nut on the exposed end of the bolt. A second threaded bore is formed in a second end (a truncated conical end) of the connector, and a step bolt is secured in the second threaded bore. The step bolt is dimensioned so that the step bolt when fastened to the connector forms a step on the structure having a length greater than the width of the workers boot. In this manner, a convenient step is formed on the structure for use in climbing the structure to perform repairs, maintenance or modifications.

A dental tool and prosthetic components/screws that allow capturing, transporting and applying torque so as to perform dental service with a single tool specially adapted for components/screws with reduced dimensions, such as, e.g., smaller than 1.4 mm in diameter.

A threaded fastener assembly for use with a nut includes a shaft head and a separate shaft. The shaft head includes a head, and an internally-threaded portion. The shaft has a first externally-threaded portion for cooperation with the internally-threaded portion of the shaft head to selectively secure the shaft to the shaft head, a second externally-threaded portion for cooperation with the nut, and an integrated nut or wrenching portion for tightening the shaft to the shaft head.

The application provides a screw threaded fastening component, which comprises a stud bolt having an external thread, a first connecting part into which a first screw threaded hole adaptive to the stud bolt is formed, and a second connecting part into which a second screw threaded hole adaptive to the stud bolt is formed, and a threaded direction of the second screw threaded hole is against the threaded direction of the first screw threaded hole. The first connecting part and the second connecting part are assembled on two ends of the stud bolt through the first screw threaded hole and the second screw threaded hole, respectively, and the first connecting part is engaged against the second connecting part when the stud bolt is rotated in a direction. The stud bolt is contained in the first screw threaded hole and the second screw threaded hole when the first connecting part and the second connecting part are engaged completely. The application omits the screw head ordinarily designed in screw threaded connection such that the space is saved and the affection on the appearance of the product caused by the exposed screw head can be prevented.

A draw stud assembly for use with a knockout punch tool having a movable piston, includes a connector attachable to the movable piston, a draw stud, and a quick connect mechanism. The quick connect mechanism includes mating first and second thread segments on the connector and the draw stud, respectively. The connector and the draw stud are movable between a first relative orientation where the mating first and second thread segments are misaligned to permit axial movement between the connector and the draw stud, and a second relative orientation where the mating first and second thread segments are aligned and engaged to inhibit axial movement between the connector and the draw stud.