| CPC F16B 35/06 (2013.01) [F16C 11/04 (2013.01); F16B 23/0015 (2013.01)] | 12 Claims |

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1. A fastener comprising:
a threaded shank extending along an axis between top and bottom ends;
a substantially hollow semi spherical body affixed at said top end of said threaded shank; and
a head having a receptacle adapted to closely surround said semi-spherical body, said head being pivotable about said semi spherical body and rotatably fixed relative to said semi spherical body about said axis of said threaded shank;
and a drive socket disposed nested within said semi spherical body of said head adapted to receive a tool for rotating said head and said threaded shank about said axis of said threaded shank.
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