FIELD: construction.
SUBSTANCE: set from a bolt and a nut comprises a collapsible part arranged at the end of the bolt with the possibility of folding to any side from the direction along the bolt axis around the axis perpendicular to the bolt axis; and slots arranged at the end surface of the nut, every of which is formed so that a collapsible part could be inserted in it. Number of slots is an odd number. Slots are arranged radially with an equal angle pitch relatively to the centre of the threaded hole of the nut. On each of the sides of the collapsible part there is a convex part capable of being inserted into one of slots as the collapsible part is folded.
EFFECT: prevention of slipping between a bolt and a nut.
5 cl, 11 dwg
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