Abstract: A male fastener, female fastener, and a plunger that is adapted to secure the female fastener to the male fastener, and to prevent unwanted loosening of the female fastener from the male fastener. The male fastener includes a shaft that may optionally include a plurality of protruding elements that extend outwardly from an external surface of the shaft. The protruding elements may be radially positioned in rows around a circumference of the shaft, to create a channel between the rows of protruding elements. The channel is adapted to receive a corresponding thread located within an aperture of the female fastener. The plunger is adapted to be inserted into a trench located between a set of protruding elements (or into multiple trenches located between multiple protruding elements). The plunger prevents the female fastener from rotating around the shaft in a direction towards the bottom portion of the male fastener.

Abstract: A wheel nut assembly for fixing a wheel to a vehicle hub which includes a wheel nut with an internal thread; a wheel stud having an external thread to co-operate with the internal thread of said wheel nut and having an end portion adapted to project beyond the wheel nut which end portion includes axial grooves o ribs on its external surface; a retaining cap with internal grooves or ribs complementary to the external ribs or grooves on said wheel stud adapted to fit over said wheel stud and said wheel nut; and means to secure the retaining cap to said wheel nut. The retaining cap prevents rotation of the nut once it has been tightened In some embodiments an aesthetic cover is provided to improve the appearance of the wheel. This aesthetic cover may also be used to lock the retaining cap to the nu and provide an indication that the nut is securely fastened.

Abstract: A tie bolt assembly for a log building has a coil spring that applies a continuous compressive load to force the logs together. Subsequent expansion or separation of the logs is prevented by a ratchet mechanism acting between the tie bolt and log.

Abstract: A length-adjustable upper steering arm for a three-point coupling device, including a connecting eye having a threaded shank, and a coupling hook having a threaded shank, both of which are received in threaded bores of a sleeve, and which threads extend in opposite directions. To achieve a locked position or disengaged position of the coupling hook relative to the sleeve, there are provided an actuating lever and a locking ratchet which is partially pivotable independently thereof. Because the spring-loaded locking ratchet may be pivoted from the disengaged position into the engaged position independently of the actuating lever, the thread is not subject to jamming forces.

Abstract: A multi-arm tractor hitch with an improved adjustable arm having a pair of threaded end members with slots therealong, a middle member engaged with the end members in turnbuckle fashion, a locking member movably, preferably pivotably, attached to the middle member and having tabs positioned to engage the slots of both ends members when the locking member is in a lock position, to firmly lock them and the middle against relative rotation without any connection beyond the middle member.