| 摘要 |
The present invention relates to a screw (1) providing a balance weight to be secured to a household appliance, for example a washing machine, in prestressed manner, having a head (2) providing the screwing operation to be performed by being rotated, mounted with a spring washer on the lower side, and a shank (3) extending under the head (2) having a threaded portion thereon, a cylindrical shoulder (4) disposed on the part of the screw (1 ) where the shank (3) joins with the head (2), with a diameter greater than that of the shank (3). |
