Nut and tool

1. A nut, comprising:

a female thread for threading a bolt thereinto;

a head surrounding said female thread, for holding said female thread, for allowing rotating the bolt in relation to said female thread; and

a male thread, for threading said nut through an object, wherein said male thread comprises:

an external binding;

central bindings; and

an internal binding, the central bindings being between the external binding and the internal binding, wherein the male thread has a width that gradually tapers from the external binding to the internal binding; and

a space disposed between an end of said internal binding and an adjacent surface of said head, for allowing rotating said nut in relation to said object without linear pacing in relation to the object upon completing the threading therebetween,

wherein a perimeter of the male thread increases from the external binding towards said space of said male thread,

wherein rotation of said female thread in relation to said bolt while said bolt is fixed to a building structure, together with rotation of said nut in relation to said object, increases or decreases a distance between the object and the building structure,

wherein the female thread extends an entire length of the nut spanning the head, the space, and the male thread.

2. The nut of claim 1 , further comprising an elastic washer, disposed in said space, for limiting movement between said male thread and the object upon completing the threading therebetween.

3. The nut of claim 1 , wherein, when the object is within the space, an end of the internal binding is configured to interact with a bending at a hole in said object to bend the end of the internal binding toward the external binding and remove the bending of the object from a gap between bindings of the male thread.