A gas turbine engine includes a bushing that is non-round in cross-section, the bushing receivable within an aperture. A fastener passes through the bushing to retain a second component to a third component with respect to the first component.

A method of making an assembly is disclosed. According to the method, a curable sealant is applied to a metal surface of a first article, and the curable sealant and first article are stored under conditions to maintain the curable sealant in an at least partially uncured state. The method further includes contacting the curable sealant on the first article metal surface with an electrically conductive surface of a second article, and curing the curable sealant.

A tool for driving a threaded rod includes a shell, multiple balls and a cover. The shell includes a ring and a stepped aperture. The ring is formed on an internal face of the shell. The stepped aperture includes a first section on a side of the ring, a second section in the ring, and a third section on an opposite side of the ring. The multiple balls are inserted in the third section of the stepped aperture. The cover includes tube inserted in the first section of the stepped aperture through the second and third sections of the stepped aperture so that the cover retains the balls in the shell.

A coupling bolt hole alignment tool, a method to align two coupling holes, one in each of two coupling halves, and a system to align two coupling holes are provided. The coupling bolt hole alignment tool and system includes an expandable sleeve assembly configured to be inserted into the second coupling hole and secured into the second coupling hole with a wedge nut. A rotatable rod including an eccentric hole formed in one end of the rod is contained within the expandable sleeve assembly. A pin/paw assembly includes a pin and paw. The pin is inserted into the eccentric hole from the first coupling hole and the paw is disposed within the first coupling hole and includes a portion oriented against a wall of the first coupling hole. Rotation of the rotatable rod while the pin/paw assembly is held stationary by a restraining device aligns the two coupling holes.

A method for joining at least two structural parts includes a fitting step in which a joining element is driven into the first structural part while a residual material thickness is maintained, and a joining step in which the joining element driven into the first structural part is connected to the second structural part. The joining element has a hollow element shaft, which is driven into the first structural part, and an element head, which is welded or adhesively bonded to the second structural part.

To provide a steel for bolts with excellent delayed fracture resistance and cold forgeability while maintaining the strength as a steel material, and also to provide a bolt producing from such a steel for bolts.

The steel for bolts according to the present invention includes, in percent by mass: 0.20 to 0.40% of C; 1.5 to 2.5% of Si; 0.20 to 1.5% of Mn; more than 0% and 0.03% or less of P; more than 0% and 0.03% or less of S; 0.05 to 1.5% of Cr; 0.01 to 0.10% of Al; 0.0003 to 0.01% of B; 0.002 to 0.020% of N; and one or two elements selected from the group consisting of 0.02 to 0.10% of Ti and 0.02 to 0.10% of Nb, with the balance being iron and inevitable impurities.

A fracture-resistant double shear joint including a clevis having a first end defining a first bore and a second end defining a second bore, and a reaction load member defining a third bore, wherein the first bore, the second bore, and the third bore are colinear. The fracture-resistant double shear joint can further include a first spacer positioned within the first bore, a second spacer positioned within the second bore, and a shear pin positioned within each of the first bore, the second bore, and the third bore. The shear pin may include an outer cylinder, an inner shear bolt threaded on both ends, and nuts at either end that engage the threads. The nuts may be tightened to place the outer cylinder in compression. The spacers in the first and second bore may include a low friction liner that interfaces with the outer cylinder of the shear pin. The ends of the spacers may be set back from the ends of the first and second bores (that are next to the third bore).

A fracture-resistant double shear joint including a clevis having a first end defining a first bore and a second end defining a second bore, and a reaction load member defining a third bore, wherein the first bore, the second bore, and the third bore are colinear. The fracture-resistant double shear joint can further include a first spacer positioned within the first bore, a second spacer positioned within the second bore, and a shear pin positioned within each of the first bore, the second bore, and the third bore. The shear pin may include an outer cylinder, an inner shear bolt threaded on both ends, and nuts at either end that engage the threads. The nuts may be tightened to place the outer cylinder in compression. The spacers in the first and second bore may include a low friction liner that interfaces with the outer cylinder of the shear pin. The ends of the spacers may be set back from the ends of the first and second bores (that are next to the third bore).

A toilet fastening assembly includes a fastener, a washer, and a cap. The fastener includes a base at a proximal end, a support extending from the base, and a threaded shaft extending from the support to a distal end. The base includes two flat surfaces interconnecting two curved surfaces. The support includes two flat surfaces interconnecting two tapered surfaces. The support's flat surfaces are aligned with the base's flat surfaces. The threaded shaft includes two distal tapered surfaces that are positioned perpendicular to the base's flat surfaces and the support's flat surfaces. The cap includes an outer wall defining an inner cavity and an inner cylindrical wall disposed within the inner cavity. The inner cylindrical wall's threaded inner surface receives the threaded shaft of the fastener. The inner cylindrical wall's proximal end is recessed relative to the outer wall's proximal end.

A multilayered corrosion and anti-galling coating for threads and wearable materials is a liner that can be superimposed onto the surface of a device in order to protect the surface from environmental hazards. To accomplish this, the coating has a base adhesive layer, an intermediary insulation layer, an interstitial adhesive layer, and a lubricating material layer. The base adhesive layer adheres to the device's surface thus enabling the coating to form a sealing liner. The intermediary insulation layer is positioned in between the base adhesive layer and the interstitial adhesive layer. As a result, the intermediary insulation layer prevents negative chemical interactions between the base adhesive layer and the interstitial adhesive layer. The lubricating material layer is super imposed onto the interstitial adhesive layer to provide a friction-reducing coating for the device's surface.