| 摘要 |
The plate structures (4) are provided with holes through which screws (5) are inserted outwards relatively to the vehicle centre, each screw having grooves (12) between the head (10) and threads (11). The dimensions of the grooves relative to the hole are such that a grip is created between them and the hole. The screws are inserted manually to a position in which they do not penetrate entirely. From the plate structure outside an axial screwdriver is applied on the threaded screw part, tightening the screw to a fixed end position in the hole. The component in each case has a fixture (6) with an opening (15) corresp. to screw and is tightened with a suitable tool (8) onto the plate structure, using a nut (7) working in conjunction with the screw. The outer dia. of the screw part with the grooves comprises between 100.3 and 101.7 percent of the hole dia. |
