THREADED FASTENER SYSTEM PREVENTING MISALIGNMENT Russian patent published in 2020 - IPC F16B35/04 

FIELD: machine building.

SUBSTANCE: present invention relates to threaded fastening elements, such as screws and bolts, and more specifically to threaded fasteners, preventing incorrect screwing. System of threaded fasteners preventing misalignment comprises female fastening element with at least one inner fastening thread formed inside female fastening element, at least one internal lead-in thread formed inside the female fastener, a male fastener comprising: rod having lead-in end for screwing in of female fastening element, at least one external attachment thread formed on the outer surface of the rod as a plurality of thread turns, configured to mate with the internal fastening thread, at least one external lead-in thread, formed on outer surface of rod on its lead-in end, which extends at least half the turn around the rod and comprises a curved profile defined by an arc having a radius approximately equal to a radius of the arc tangential to both side surfaces of the profile of at least one external attachment thread and extending below dividing line of at least one external attachment thread.

EFFECT: reduced probability of misalignment, screwing without thread.

36 cl, 52 dwg