mother to the screws to a gewindebolzen.

摘要

A nut (6) for turning onto a threaded stud (4) and having a smooth bore (8) extending from an inwardly-tapering conical lead-in area (9), the nut (6) being characterised in that in the lead-in area (9) a stripping zone is formed by a plurality of parallel tubular cavities (11) of smaller diameter than the bore (8) of the nut (6), in that the cavities (11) are spaced apart and arranged symmetrically about the axis (12) of the bore (8) of the nut (6), in that the axis of each tubular cavity is spaced from the axis (12) of the bore (8) of the nut (6) by a distance smaller than the sum of the radii of the tubular cavity (11) and of the bore (8) and greater than the radius of the bore (8), in that the intersections of the walls of each tubular cavity with the wall of the bore of the nut form cutting edges (13,14), and in that the respectively adjacent tubular cavities (11) are linked to one another via cavities (15) provided therebetween so that a coating stripped from the threaded stud (4) as the nut (6) is turned onto the stud (4) can be accommodated in this cavity (15). Preferably, the nut (6) has three tubular cavities (11) which are linked together by three linking cavities (15). IMAGE