Provided in the context of a bolt is a method for achieving antiloosening capability such as will make it possible for tightening operations to be carried out easily and rapidly, and such as will make it possible to obtain antiloosening effect in robust and reliable fashion. Comprised, in such form as if a single bolt had been cut into two perpendicularly with respect to an axis thereof at a location midway along the axis thereof, of first bolt 11 having a bolt head and second bolt 12 having a threaded tip; second bolt 12 being such that an eccentric columnar portion 123 which is smaller in diameter than a diameter of the shaft of the second bolt 12 is provided at cutting plane 122 in such fashion as to protrude outward in an axial direction in eccentric fashion with respect to a direction perpendicular to a central axis, and such that side face protrusion 124 is formed at an outside circumferential side face of eccentric columnar portion 123; first bolt 11 being such that eccentric cylindrical portion 113 that mates with eccentric columnar portion 123 is formed at cutting plane 112 in eccentric fashion with respect to a direction perpendicular to a central axis, axial groove 114 being formed in a direction parallel to the central axis and radial groove 115 being formed in a radial direction at the interior thereof; the entirety constituting locking bolt 1.

Provided in the context of a bolt is a method for achieving antiloosening capability such as will make it possible for tightening operations to be carried out easily and rapidly, and such as will make it possible to obtain antiloosening effect in robust and reliable fashion. Comprised, in such form as if a single bolt had been cut into two perpendicularly with respect to an axis thereof at a location midway along the axis thereof, of first bolt 11 having a bolt head and second bolt 12 having a threaded tip; second bolt 12 being such that an eccentric columnar portion 123 which is smaller in diameter than a diameter of the shaft of the second bolt 12 is provided at cutting plane 122 in such fashion as to protrude outward in an axial direction in eccentric fashion with respect to a direction perpendicular to a central axis, and such that side face protrusion 124 is formed at an outside circumferential side face of eccentric columnar portion 123; first bolt 11 being such that eccentric cylindrical portion 113 that mates with eccentric columnar portion 123 is formed at cutting plane 112 in eccentric fashion with respect to a direction perpendicular to a central axis, axial groove 114 being formed in a direction parallel to the central axis and radial groove 115 being formed in a radial direction at the interior thereof; the entirety constituting locking bolt 1.

A locking fastener includes a thermoplastic fastener body, a locking coil, and a support collar. The fastener body defines a cylindrical cavity and a radially extending slot communicating with the cavity. The support collar has an arcuate portion and first and second tabs extending radially outward from the arcuate portion. The support collar is disposed within the fastener body with the arcuate portion adjacent the cavity wall and the tabs extending into the slot. The locking coil has a helical portion and first and second tangs extending radially outward from the helical portion. The helical portion of the locking coil is positioned within the support collar, and the first and second tangs extend into the slot and between the first and second tabs.

Expandable collet bodies with sectional finger-based anti-rotation features are disclosed. The collet body comprises not only a plurality of gripping finger as a first part of a two-part anti-rotation means (ARM), but also a first part of a two part translation arresting means (TAM), which may or may not be sectional in nature. The TAM prevents over translation of a collet body within the work piece(s), and cooperates with a second part of the TAM associated with a work piece or an auxiliary structure. In this manner, a collet body inserted into a work piece or auxiliary structure will not accidentally be pushed beyond the blind side of the work piece(s) during insertion or initial clamp-up.

A multi-patch threaded fastener includes a shank having a threaded portion and two or more polymer patches disposed on the shank. The two or more polymer patches are configured to wedge against a mating threaded component to promote contact between non-patched threaded portions of the shank and the mating threaded component to resist removal from the mating threaded component. A method of making the multi-patch threaded fastener includes positioning two or more nozzles for dispensing a patch material at locations corresponding to desired patch locations on the shank, conveying the shank past two or more nozzles, and dispensing the patch material from each nozzle onto the shank to form the two or more polymer patches on the shank.

A multi-patch threaded fastener includes a shank having a threaded portion and two or more polymer patches disposed on the shank. The two or more polymer patches are configured to wedge against a mating threaded component to promote contact between non-patched threaded portions of the shank and the mating threaded component to resist removal from the mating threaded component. A method of making the multi-patch threaded fastener includes positioning two or more nozzles for dispensing a patch material at locations corresponding to desired patch locations on the shank, conveying the shank past two or more nozzles, and dispensing the patch material from each nozzle onto the shank to form the two or more polymer patches on the shank.

A fastener comprising a nut body and an associated Lockone clasp is disclosed. The locking clasp may be maintained in its association by one or more locking clasp retainers, the retainers forming an arc. In one embodiment, the nut body is formed with an internally threaded thread bore partially filled by helical thread insert. In another preferred embodiment the helical thread insert is a free running helically wound wire thread insert.

A fastener comprising a nut body and an associated Lockone clasp is disclosed. The locking clasp may be maintained in its association by one or more locking clasp retainers, the retainers forming an arc. In one embodiment, the nut body is formed with an internally threaded thread bore partially filled by helical thread insert. In another preferred embodiment the helical thread insert is a free running helically wound wire thread insert.

A fastening nut device for fastening one substrate to another includes a cylinder, which is circumferentially larger proximate to a first end thereof, thus defining a first section and a second section of the cylinder. External threading, which is reversed, is positioned on the second section and extends from a second end of the cylinder. The cylinder can be inserted into a first hole positioned in a first substrate by counterclockwise rotation. The first section of the cylinder abuts a first face of the first substrate and the second end of the cylinder is accessible from a second face of the first substrate. A channel, which is internally threaded, extends into the cylinder from the second end. A threaded fastener, which is engaged to a second substrate, can be inserted by clockwise rotation into the channel to engage the second substrate to the second face of the first substrate.

A screw anti-loosening structure is provided including a screw disposed within a screw hole. The screw hole is disposed within a first casing. A screw groove is disposed within a second casing. At least one stub protrudes toward the screw hole of the first casing. The screw anti-loosening structure further includes at least one stub groove disposed within a side surface of a head of the screw. The at least one stub is disposed within the stub groove.