Abstract: A stacked array comprising at least one or more similar or dissimilar metals or composites and having either a tapered bore or a tapered sleeve. A tapered bolt adapted to be inserted into the tapered bore and having a taper that is different from the tapered bore. A method for selecting a greater or lesser taper on the bolt than the taper on the bore depending on the relative strength of the materials forming the stacked array as a means of reducing the installation force of the tapered bolt within the tapered bore.

Abstract: This invention describes a system and method for precisely locating a combined sleeve bolt in an opening located in a plurality of materials adapted to be connected together. The adjustable nut is constructed in two parts and rotatably attached to each other. The first part contains an internal thread for accepting one end of the sleeve bolt and a bearing surface for bearing only on one end of the projecting outer sleeve. The second portion of the nut has a greater diameter for bearing against the bottommost portion of the materials adapted to be connected together. The two portions of the nut being independently adjustable allow the sleeve bolt to be positioned within the hole regardless of any variations in the length of the sleeve. Once the desired position is achieved, the two portions are locked together, preferably by a set screw, and the tapered bolt is pulled into the hole while the adjustable nut holds the sleeve in the desired and pre-adjusted position.

Abstract: This invention describes a system and method for precisely locating a combined sleeve bolt in an opening located in a plurality of materials adapted to be connected together. The adjustable nut is constructed in two parts and rotatably attached to each other. The first part contains an internal thread for accepting one end of the sleeve bolt and a bearing surface for bearing only on one end of the projecting outer sleeve. The second portion of the nut has a greater diameter for bearing against the bottommost portion of the materials adapted to be connected together. The two portions of the nut being independently adjustable allow the sleeve bolt to be positioned within the hole regardless of any variations in the length of the sleeve. Once the desired position is achieved, the two portions are locked together, preferably by a set screw, and the tapered bolt is pulled into the hole while the adjustable nut holds the sleeve in the desired and pre-adjusted position.

Abstract: A fastener, primarily of the precision type for aircraft use in holding together multiple metal stack-ups, makes use of a sleeve, a headed shaft and a nut. The shaft and sleeve as a subassembly is inserted in a hole in a stack-up of sheets, the nut is applied to the shaft and the shaft is drawn forceably into the passageway to expand the sleeve laterally into anchored engagement with the wall of the hole. The fastener is of special construction in that it is an installation formed fastener and sleeve assembly for fatigue critical aircraft structure where the combination of sheet, plate, forgings and other fastener assembly materials may vary in modulus of elasticity, hardness and other physical properties. The fastener assembly consists of a sleeve, a bolt, rivet or stud, and suitable means of retention such as a self locking nut or collar. The sleeve is partially formed and machined to final dimension while in place on the exact bolt which is ultimately used when completing the fastener assembly in place.