A lock tab washer for a pipe hanger includes a washer body; an edge tab defining a first section and a second section, wherein the first section extends from the washer body and the second section is bent relative to the first section in a first direction; and first, second, and third nut tabs extending from the washer body, wherein each of the first, second, and third nut tabs are bent relative to the washer body in a second direction opposite the first direction.

A washer includes a hub and a first lobe connected to the hub. The first lobe includes a first hole. A second lobe is also connected to the hub and includes a second hole. A third lobe is also connected to the hub and includes a third hole. The first lobe extends from the hub at least partially in a first direction opposite the second lobe and the third lobe.

The invention concerns a key device intended to hold a nut retainer in the radial position, when tightening the nut on an associated screw connection, characterised in that it comprises a handle (54) and a head (52) comprising a housing (56) into which a tab of the nut retainer is inserted, said tab being intended to be folded 90° on a body carrying the screw connection, after tightening of the nut, one face (58) of the head having geometry that matches a portion of the body carrying the screw connection that receives the nut, such that the tab of the nut retainer, inserted into the head of the key, is held exactly perpendicular to the outer surface of said portion of the body when the nut is tightened.

A washer includes a first lobe comprising a first hole, a second lobe comprising a second hole, a third lobe comprising a third hole, and a fourth lobe comprising a fourth hole. A first leg extends from the first lobe to the second lobe, and a second leg extends between the third lobe and the fourth lobe, wherein the second leg is parallel to the first leg. A third leg extends from the first lobe to the third lobe and spaces the first leg from the second leg such that the second lobe is disposed opposite the fourth lobe.

A replacement for cylindrical dowel nuts is provided and is a hollow cylindrical nut with a threaded hole on top and an unthreaded hole at the bottom which is for the threaded shank to enter. This hollow dowel nut elastically compresses during tightening to act like a lock-washer to prevent loosening. Several solutions are provided to make the top of the nut thicker to fit more thread coils than what wall thickness would otherwise permit. To improve loosening prevention further and also provide overtightening prevention a hollow nut with flatter bottom and a narrow gap bisecting the lower hole are used which during tightening cause right and left edges of said gap to be pushed towards the bolt strongly gripping it which prevents overtightening and loosening. “C” shaped nuts also provided which cause misalignment and jamming in the thread when compressed thereby also preventing loosening and overtightening.

A pull-off device is for a radially expandable bushing on a pivot pin. An end plate is arranged to rest against a bushing end face. The end plate is arranged to be attached to a pin end face via at least one first screw which extends through a cut-out in the end plate and into a threaded bore with a first thread diameter in the pin end face. A coupling element forms a releasable, axial connection between the end plate and the bushing. The end plate is provided with at least one threaded screw hole with a second thread diameter arranged in the axial direction of the end plate and is arranged to receive a second screw which, by axial displacement towards the pin end face, subjects the end plate and the bushing to a force directed axially outwards. A locking device for a bolt is described as well.

A lock nut and tang washer mechanism preloads and locks components in a rotating environment. A drive system mechanism preloads and locks the device in a rotating environment and provides a double locking safety requirement needed in most aircraft for applications operating in an enclosed environment. The mechanism holds a required torque for the duration of the drive system operating life without the need for periodic visual inspections.

A hanger for a pipe, the hanger comprising: a suspension member configured to engage the pipe, the suspension member comprising a side edge and defining a hole in through the suspension member; a threaded rod extending through the hole; a nut threaded on the threaded rod; and a lock tab washer disposed on the threaded rod between the suspension member and the nut, the lock tab washer comprising a first tab and a second tab, the first tab bent over a side edge of the suspension member, the first tab configured to prevent the lock tab washer from rotating with respect to the suspension member, the second tab bent over a circumferential side of the nut, the second tab configured to prevent the nut from rotating with respect to the lock tab washer.

A locking device (11), e.g. a lock washer, for use with a screw threaded fastener (71), said locking device comprising at least a first disc-like body (12) comprising an annular portion (13) with at least one aperture (15) therein and a central through-hole (14) e.g. a washer having notches (15) open to the outer periphery and at least one further body (25) held in said one aperture (15). The further body may be shim (22) also having a central hole (24) and at least one tab (25) which extends through the notch (15) and has an end portion which juts above adjacent surface of the washer to engage an adjacent surface on the fastener when compressed, on tightening of the fastener deflects within the void of the aperture in which it is located under the influence of the tightening of the engaging surface such that under any tendency to loosen, the tab jams against the opposing surfaces and resist loosening of the fastener.

Disclosed are systems and methods for vehicle conversion projects. In one embodiment, disclosed are systems and methods for a flooring system, which can be used for installation in vehicle. In some embodiments, the flooring system includes flooring sections having matching tabs and notches that interlock. In certain embodiments, a clamping method uses bolts, nut inserts, and washers to clamp the flooring sections to each other. In one embodiment, the washers are configured and placed to overlap joints of the flooring sections. In some embodiments, floor brackets can be used to secure a flooring section to a fixed fixture of the vehicle. In one embodiment, the flooring sections are patterns cut into sheets of material and provided with retaining tabs to facilitate flat pack shipping of the flooring sections.