Connector

A blind fastener for clamping together two components through which, in use, the fastener extends, said fastener comprising:

• a sleeve having a first end which is radially expandable;
• a threaded fastener configured to extend through the sleeve;
• an expansion head threadedly mounted on the threaded fastener to engage with said first end of the sleeve whereby movement of the expansion head towards a second end of the sleeve forces the first end to expand;
• a collar configured to engage with the second end of the sleeve and having an aperture through which the threaded fastener extends,
• wherein the threaded fastener has a head formation for effecting rotation of the threaded fastener in an assembled condition in which the collar is positioned between the head portion and the sleeve,
• said second end of the sleeve and the collar define confronting surfaces and said confronting surfaces comprise inter-engaging formations which resist relative rotation of the sleeve and collar but permit their axial separation, and
• the inter-engaging formations in the confronting surfaces of the sleeve and collar comprise a depression in the surface of the collar.