THREADED JOINT Russian patent published in 2006 - IPC F16B39/20 

FIELD: mechanical engineering.

SUBSTANCE: threaded joint comprises bolt with opening for locking the member, nut, and washers. The nut has additional chamfering on the top edge of the central opening whose width is at least 3 mm. The opening in the bolt is provided with the chamfering whose width is equal at least 2 mm. Height H is determined from the formula: H_m = H_n + h_w + h , where H_n is the height of the nut, h_w is the height of the washers, h is the height of the space between the nut and bottom edge of the locking member h_s = ½ D_lm, where D_lm is the diameter of the locking member which is round in the cross-section and spring member made of the semi-ringwhose edge are bent inside along the axis perpendicular to the axis of symmetry.

EFFECT: enhanced reliability.

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