NUT AND COMBINATION OF BOLT ELEMENT AND NUT Russian patent published in 2015 - IPC F16B37/08 

FIELD: machine building.

SUBSTANCE: invention relates to fasteners, in particular, to nut. The nut contains the first part, that has first through hole, and the second part with second hole having the set contour. These parts are connected with each other with the possibility of rotation around the axis of rotation passing through the holes, and holes overlap each other. The first hole on its internal surface has profiling passing in the circumferential direction and terminated in circumferential direction, and contour of the hole of the second part is not round. The second part is installed with possibility of limited angle of rotation around the axis relatively to the first part between the rotated position and disconnection position, these parts in the rotated position are fixed with the form closure relatively to each other, and to exit this rotated position it is necessary to apply force to the part locking this rotation position, for example push-button.

EFFECT: increased reliability of the bolt and nut connection.

8 cl, 16 dwg