FIELD: technological processes.
SUBSTANCE: male element is disposed in the snapping direction and contains, at least, one symmetry plane including the snapping direction. The male element comprises of the following parts downwards in the snapping direction: a head, middle part, a base with cross section, expanding downwards, and a flat support which is perpendicular to the symmetry plane. The head is of tapered shape in section, perpendicular to the symmetry plane and including the snapping direction. The cone centre is pointed upwards. The head, at least, consists of two flat bottom walls symmetrical against said symmetry plane. Each of the flat bottom walls is connected with a flat side wall of the middle part. The flat side walls are symmetrical relative the symmetry plane, wherein each bottom wall of the head shapes an angle from 100 to 120° with a side wall of the middle part, and the head width in the direction, which is perpendicular to said symmetry plane, exceeds the head height in the snapping direction.
EFFECT: reliable element snapping for a long period of time.
11 cl, 4 dwg
