FAMILY OF FASTENING ELEMENTS, CHECK GAUGE AND CONTROL METHOD OF SELECTION OF FASTENING ELEMENT LENGTH Russian patent published in 2013 - IPC F16B23/00 F16B39/00 

FIELD: machine building.

SUBSTANCE: invention refers to a family of fastening devices containing at least two fasteners; with that, each of the above elements is located along the first axis and includes a head, a smooth rod and a processed end section, which are located on one line. Besides, the above processing of the end section is thread or annular slots for press fitting; front side of the processed end section includes a cavity made parallel to the first axis to the bottom. Fasteners have the same average outside diameter of the processed end. Fasteners have different maximum tightening degrees. The above maximum tightening degree corresponds to length of the smooth rod along the first axis between the head and the boundary between the above rod and the processed end section. The family is configured so that distance along the first axis between the bottom of the cavity and boundary between the rod and the processed end section is equal for all the fasteners. Therefore, for all the elements of the family there can be used an identical check gauge to check that the fastener has the length corresponding to thickness of the attached structure.

EFFECT: enhanced operating reliability.