| 摘要 |
An engineering element for facilitating extraction of sheared threaded studs and other fastening element. The elements comprises a body having a first face (12), a second face (11) opposite to said first face and a passageway (13) extending between the two faces. The body has an inwardly directed flange (14) at the first face (12) which flange can be welded to the sheared stud. The exterior of the body is hexagonal in shape to receive a spanner by means of which the body can be rotated to unscrew the sheared stud. |
