| 摘要 |
A screw connection for a roof skylight comprises a screw which passes through a shell forming a light dome and through a shell mounting frame. Carried in the frame is a nut with a head on the side of the frame remote from the dome, the head preventing the nut from rotating in the frame as the screw is turned by co-operating with a portion of the frame. A locking plate is fitted onto the nut on the side of the frame remote from the nut head, to hold the nut in position in the frame while the nut and screw are not interengaged. |
