A three-piece locking fastener including an interiorly threaded intermediate component open at opposite ends. A first screw having a first exterior thread pattern rotationally inter-engages with the interior threads of the intermediate component when installed through a first selected one of the opposite ends, the first screw having a hollow shaft exhibiting a further plurality of interior threads matching a direction of the first thread pattern. A second screw has a second exterior thread pattern opposite the first pattern and, upon being installed within the other selected one of the opposite ends, rotationally inter-engages the interior threads of the first screw, so that loosening of either of the first and second screws being prevented by their counter-threaded orientation.

A probe fastening system has a plate having at least one coupling-on recess and having at least one alignment element, which is arranged in the outer region of the plate, a backplate which has a fastening device for the fastening of a static probe and at least one recess which corresponds with the alignment element, at least one peelable shim which corresponds with the alignment element and which is arranged between the plate and the backplate, at least one alignment device which corresponds with the alignment element, and a coupling-on element which defines a cavity and which is designed for isobarically coupling the static probe onto the coupling-on recess.

A heat shield assembly for use with an aircraft engine. The heat shield assembly includes a structural member, a heat shield panel adapted for exposure to aircraft engine exhaust, an index joint coupling the heat shield panel to the structural member in a fixed positional location, and a plurality of slip joints coupling the heat shield panel to the structural member. Each slip joint includes at least one wear buffer coupled to the heat shield panel, and a slip fastener insertable through a slip joint hole in the heat shield panel with a clearance fit. A gap defined by the clearance fit is sized to provide a tolerance for expansion and contraction of the heat shield panel relative to the fixed positional location, and the at least one wear buffer is engageable by the slip fastener during expansion and contraction of the heat shield panel.

An external thread member capable of performing a fastening operation efficiently without increasing the number of parts by assembling a collar into the external thread member. The external thread member 1 includes a shaft portion 5 inserted into a mounting hole 105 of a mounting member 101 through a collar 7, and the mounting member 101 is fastened to a fastening member 102. The shaft portion 5 includes a threaded portion 51 and a neck portion 52. The collar 7 is mounted on the neck portion 52 so as to be rotatable relative to each other and is engaged with the threaded portion 51 whereby retention is achieved. A counterbore hole 106 is formed in an opening close to the mounting hole 105 of an internal thread hole 104 with a tubular portion 71 inserted into the mounting hole 105 of the collar 7.

A threaded fastener composed of separate upper and lower portions with a small axial freedom of movement relative to one another. After being threaded into a blind hole together, the portions are moved relative to one another and locked in place, creating a distribution of stresses which resists backing-out of the fastener without the various drawbacks which limit prior art solutions to this and similar threaded fastener applications.

A bolt includes a shank having a first end, a second end, a first external thread proximate to the first end, and a second external thread proximate to the second end. The first external thread twists in a first direction, the second external thread twists in a second direction, and the first direction is different from the second direction. The first external thread includes a minor diameter, the second external thread includes a major diameter, and the minor diameter of the first external thread is greater than the major diameter of the second external thread.

An assembly for securing a workpiece. The workpiece includes a bore having a first opening in a first surface of the workpiece. A limiter extends between a proximal end and distal end and defines a bore and is received in at least a portion of the bore of the workpiece. A fastener extends along an axis between a proximal end and a distal end. The fastener has a head at the proximal end and a plurality of threads at the distal end. The fastener is received in the bore of the workpiece so that the distal end of the fastener having the plurality of threads is opposite the first opening of the bore. A first spring element is disposed about the fastener and is between the head of the fastener and the first surface of the workpiece. The first spring element is configured to generate a deflection force when the first spring element is subjected to a compression force during a tensioning of the assembly.

A multi-piece locking fastener having an intermediate component exhibiting a plurality of interior threads arrayed in a first direction. A first fastener has a first enlarged head and a first stem exteriorly threaded in the first direction. A hollowed interior is formed in an end of the stem and exhibits a further plurality of interior threads extending in a second direction opposite the first direction. A second fastener has a second enlarged head and a second stem, upon which is configured a second exterior thread pattern extending in the second direction. The first fastener is installed through the intermediate component from a first direction, with the second fastener rotationally inter-engaging the exposed interior threads of the first fastener in the second direction until the second enlarged heads contact the intermediate component, with loosening of either of the first and second fasteners being prevented.

A structural assembly, preferably for creation of a firewall, is constructed using anchors attached to at least a first structure and a concrete wall. Preferably, the concrete wall is also attached to a second structure as well. The body of the anchors is fabricated from a material that fails at a temperature in excess of 1,000° F. A fastening member, preferably a grommet assembly, is positioned in an elongate slot for connecting the first face to the first structure and for sliding engagement within the elongate slot in response to relative movement of the first structure and/or the second structure and the attached concrete wall.

A floating connection fastening system employs a semi-flexible floating bushing having a sleeve that may have an axial slot which captures a fastener having a head, an unthreaded shank portion and a threaded portion. The sleeve may have an outer primary surface and a plurality of protuberances that project outward from the outer primary surface. An offset cap mounts to the bushing/fastener assembly and receives a driver bit. The offset cap defines an offset clearance for installation of the fastener and bushing. The floating connection is installed by driving the fastener through a non-load bearing member so as to form a bore and threadably engage a load bearing member. The floating bushing has a flange which engages the surface of the non-load bearing member, and the sleeve is entirely received in the formed bore.