Abstract: A plug is suitable for use in preformed blind holes in rigid and soft material and also holes in sheetform material.The plug comprises a head portion (2) joined to a tail portion (10) by four legs (12), all having flexing points (20, 22, 24) towards their ends and in a central portion.The tail portion has a thread formation (16, 18) formed by a moulding process.

Abstract: A plug is suitable for use in preformed blind holes in rigid and soft material and also holes in sheet form material. The plug comprises a head portion joined to a tail portion by four identical legs, all having flexing points towards their ends and in a central portion, the radial thickness of the legs increasing towards the central portion, so that the outer diameter of that portion is greater than the diameter of the tail portion and the head portion, and the transverse thickness of the legs decreasing towards the central portion.

Abstract: Sleeve anchor comprising a tapered stem increasing in section to form a head at one end, at least the end portion of the stem remote from the head being threaded, a tubular sleeve placed over said stem being retained between the head and a threaded retaining member screwed onto the threaded end of the stem and in which the retaining member may also serve to hold a component to be attached to the anchor. Ratchet teeth are provided on the inner face of the retaining member and on the end of the tubular sleeve adjacent to the retaining member whereby in operation the two sets of teeth are engaged so that the sleeve is positively rotated with the retaining member and the outer wall of the tubular sleeve is further provided with radially-directed cutting teeth which engage the walls of the bore hole into which the anchor is inserted as the tubular sleeve is simultaneously rotated and expanded by the action of the tapered stem.