Device for securing against axial displacement

Device for securing an element projecting through an opening against axial displacement of the element comprising a first end of the element projecting through the opening being formed with a noncircular cross-section and with a peripheral slot, a closed substantially circular perforated disc mounted on said projecting first end for rotating therewith and having at least a part thereof formed of material harder than that of the element, said perforated disc having an inner contour corresponding to the cross-section of said projecting first end, slot-shaped recesses interrupting said inner contour, at least one projection formed at an outer peripheral region thereof within the substantially circular periphery thereof for facilitating turning thereof and, after being mounted on said projecting first end, said perforated disc being turnable relative to the element to an extent that at least said part thereof formed of said harder material engages in said peripheral slot, a U-shaped bearing bracket having said opening formed therein and another opening formed therein, said perforated disc being disposed outside said bracket, said element having a second end and being a shaft rotatably projecting through said openings and having another slot formed therein between said ends for securing the end of a safety belt, and another projection larger than said other opening being integral with said second end outside said bracket.