Fastening device

Claim 1

A MOLDED ONE-PIECE NUT COMPRISING A BODY OF THREAD IMPRESSIONABLE ELASTIC THERMOPLASTIC MATERIAL HAVING FIRST AND SECOND ENDS, A BORE DEFINING A NUT AXIS AND IN OPEN COMMUNICATION WITH AT LEAST SAID FIRST END AND ADAPTED TO CONFORM TO AND FRICTIONALLY ENGAGE AN EXTERNAL THREAD OF AN EXTERNALLY THREADED MEMBER, SAID NUT ALSO HAVING A WORK CLAMPING SURFACE FACING AWAY FROM SAID SECOND END AND AXIALLY SPACED FROM SAID FIRST END AND HAVING A PREDETERMINED WIDTH IN A FIRST AXIAL PLANE AND A PREDETERMINED LENGTH GREATER THAN SAID WIDTH IN A SECOND AXIAL PLANE PERPENDICULAR TO SAID FRIST PLANE, SAID NUT ALSO HAVING A PAIR OF STOP SURFACES AXIALLY BETWEEN SAID WORK CLAMPING SURFACE AND SAID FIRST END, SAID STOP SURFACES ON OPPOSITE SIDES OF AND FACING AWAY FROM AND AT LEAST SUBSTANTIALLY PARALLEL TO AND EQUIDISTANT FROM SAID FIRST PLANE, EACH SAID STOP SURFACE SPACED FROM SAID FIRST PLANE A PREDETERMINED DISTANCE GREATER THAN HALF SAID WIDTH AND LESS THAN HALF SAID LENGTH, SAID STOP SURFACES ALSO BEING ENTIRELY ON OPPOSITE SIDES OF SAID SECOND PLANE, ALL PARTS OF SAID NUT AXIALLY BETWEEN SAID WORK CLAMPING SURFACE AND SAID FIRST END AND ON THE OPPOSITE SIDE OF SAID SECOND PLANE FROM EACH SAID STOP SURFACE BEING CLOSER TO SAID AXIS THAN SAID PREDETERMINED DISTANCE, SAID STOP SURFACES ADAPTED TO ENGAGE THE WALLS OF AN ELONGATED APERTURE IN A WORKPIECE TO LIMIT ROTATION OF SAID NUT WITH RESPECT TO SAID APERTURE, AND SAID NUT ALSO HAVING A PAIR OF CAM SURFACES INTERSECTING SAID WORK CLAMPING SURFACE AND ADAPTED TO ENGAGE THE WALL OF SAID APERTURE TO DRAW SAID NUT THROUGH SAID APERTURE.