According to some embodiments, a compression strut comprises a first strut body comprising a threaded end and a hollow end, and a second strut body comprising a threaded end and a shaped end. The hollow end of the first strut body is slidably coupled to the shaped end of the second strut body. A spring is disposed between the first strut body and the second strut body configured to resist longitudinal compression of the compression strut. The first strut body is rotationally coupled to the second strut body so that rotation of the first strut body also rotates the second strut body and rotation of the second strut body also rotates the first strut body. A first ball end is threaded to the first strut body and a second ball end is threaded to the second strut body.

According to some embodiments, a compression strut comprises a first strut body comprising a threaded end and a hollow end, and a second strut body comprising a threaded end and a shaped end. The hollow end of the first strut body is slidably coupled to the shaped end of the second strut body. A spring is disposed between the first strut body and the second strut body configured to resist longitudinal compression of the compression strut. The first strut body is rotationally coupled to the second strut body so that rotation of the first strut body also rotates the second strut body and rotation of the second strut body also rotates the first strut body. A first ball end is threaded to the first strut body and a second ball end is threaded to the second strut body.

A coupling nut includes: a simple fastening nut housing case having bolt insertion holes for insertion, from end portions of the simple nut housing case, of bolts to be coupled, and, in sections of the housing case toward end portions thereof, simple fastening nut housing portions configured to non-rotatably house simple fastening nuts that screw together with the bolts inserted into the bolt insertion holes; and a simple fastening nut that is housed in each simple fastening nut housing portion of the housing case, provided with at least two or more nut segments that are biased by biasing springs, and configured to screw together with a screw portion of the inserted bolt when the housing case is rotated in a screwing direction after insertion of the bolts. One simple fastening nut has a left-hand thread and the other has a right-hand thread.

A coupling nut includes: a simple fastening nut housing case having bolt insertion holes for insertion, from end portions of the simple nut housing case, of bolts to be coupled, and, in sections of the housing case toward end portions thereof, simple fastening nut housing portions configured to non-rotatably house simple fastening nuts that screw together with the bolts inserted into the bolt insertion holes; and a simple fastening nut that is housed in each simple fastening nut housing portion of the housing case, provided with at least two or more nut segments that are biased by biasing springs, and configured to screw together with a screw portion of the inserted bolt when the housing case is rotated in a screwing direction after insertion of the bolts. One simple fastening nut has a left-hand thread and the other has a right-hand thread.

A quick release lock tumbuckle includes a socket slideable axially over a turnbuckle connecting between two threaded rods at a desired end-to-end spacing. The socket has a multi-sided interior cross section engaging a multi-sided exterior cross section of the tumbuckle, and also engaging a radially extending feature on one of the threaded rods to prevent rotation of the turnbuckle in the locked position. The socket is slideable axially off the tumbuckle to allow rotation of the turnbuckle in the unlocked position to change the desired end-to-end spacing between the two threaded rods.

A quick release lock tumbuckle includes a socket slideable axially over a turnbuckle connecting between two threaded rods at a desired end-to-end spacing. The socket has a multi-sided interior cross section engaging a multi-sided exterior cross section of the tumbuckle, and also engaging a radially extending feature on one of the threaded rods to prevent rotation of the turnbuckle in the locked position. The socket is slideable axially off the tumbuckle to allow rotation of the turnbuckle in the unlocked position to change the desired end-to-end spacing between the two threaded rods.

A tension rod has an outer shaft slidably receiving an inner shaft. A tension mechanism includes a partially threaded rod with a threaded portion. A first end extends from the threaded portion and is adapted for fixing to an inner surface of the inner shaft; a second end has a tapered body with a greater transverse dimension closer to the second end. A wedge has a slot and an inner surface in facing sliding engagement with the tapered body between a nut threadedly engaged with the threaded portion and the second end. The nut is rotationally fixed to the outer shaft. Upon relative rotation of the inner and outer shafts, the nut moves along the threaded portion toward the second end, the wedge abutting and moving with the nut. The wedge contacts the tapered body, expands radially, and contacts the inner surface of the outer shaft, locking the shafts together.

A tension rod has an outer shaft slidably receiving an inner shaft. A tension mechanism includes a partially threaded rod with a threaded portion. A first end extends from the threaded portion and is adapted for fixing to an inner surface of the inner shaft; a second end has a tapered body with a greater transverse dimension closer to the second end. A wedge has a slot and an inner surface in facing sliding engagement with the tapered body between a nut threadedly engaged with the threaded portion and the second end. The nut is rotationally fixed to the outer shaft. Upon relative rotation of the inner and outer shafts, the nut moves along the threaded portion toward the second end, the wedge abutting and moving with the nut. The wedge contacts the tapered body, expands radially, and contacts the inner surface of the outer shaft, locking the shafts together.

A connector assembly includes a shank having an inner abutment proximate to an inner extremity, and an outer abutment proximate to an outer extremity. A connector includes an inner loop that encircles the shank between the inner abutment and the outer abutment and that is movable reciprocally along the shank, a first portion that extends outwardly from the inner loop to a second portion that extends from the first portion past the outer extremity and the abutment to a third portion that extends inwardly and forwardly from the second portion to a pivotally mountable outer loop. Tensioned compression springs encircle the shank between the inner abutment and the inner loop, and act between the inner abutment and the inner loop urging the inner loop toward the outer abutment.

A connector assembly includes a shank having an inner abutment proximate to an inner extremity, and an outer abutment proximate to an outer extremity. A connector includes an inner loop that encircles the shank between the inner abutment and the outer abutment and that is movable reciprocally along the shank, a first portion that extends outwardly from the inner loop to a second portion that extends from the first portion past the outer extremity and the abutment to a third portion that extends inwardly and forwardly from the second portion to a pivotally mountable outer loop. Tensioned compression springs encircle the shank between the inner abutment and the inner loop, and act between the inner abutment and the inner loop urging the inner loop toward the outer abutment.