An anchorage (10) for securing an object to a fixture and comprising a tapering body portion (12), thread means (16) extending around the body portion (12) and a region of weakness (30) part way along the body portion (12). The region of weakness (30) comprises a groove (30) or other suitable formation which enables the anchorage (10) to be selectively shortened. The anchorage (10) further comprises a central passage down which a series of ribs (37) is located. These ribs (37) enable the anchorage (10) to receive threads varying in size as a consequence of manufacturing tolerances. The anchorage (10) may also comprise securing formations (14) in the form of a secondary thread or other suitable formation(s) which facilitate secure location of the anchorage (10) in a fixture.