Self-staking fastener having alternate teeth and lands

Claim 1

SELF-STAKING FASTENING MEANS COMPRISING A UNITARY MEMBER HAVING AN AXIALLY EXTENDING ANNULAR GUIDE PORTION, A STAKING PORTION SPACED LONGITUDINALLY FROM SAID GUIDE PORTION AND OF GREATER LATERAL SIZE THAN SAID GUIDE PORTION, A PERIPHERAL ANNULAR GROOVE ABOVE SAID GUIDE PORTION AND UNDERLYING SAID STAKING PORTION, SAID GROOVE BEING DEFINED BY CIRCUMFERENTIALLY CONTINUOUS RADIALLY EXTENDING TOP AND BOTTOM WALLS, SAID GROOVE HAVING INTERNAL DIMENSIONS SMALLER THAN THOSE OF SAID STAKING PORTION, SAID STAKING PORTION COMPRISING CIRCUMFERENTIALLY SPACED STAKING TEETH ON THE PERIPHERY OF SAID STAKING PORTION, AND CIRCUMFERENTIALLY SPACED LANDS BETWEEN SAID TEETH, SAID LANDS TERMINATING IN RADIALLY EXTENDING STOP SURFACES SPACED AXIALLY ABOVE THE TOP WALL OF SAID GROOVE SAID STAKING TEETH TERMINATING AT POINTS AXIALLY BELOW SAID TOP WALL OF SAID GROOVE AND ABOVE SAID BOTTOM WALL OF SAID GROOVE, AT LEAST THE MAJOR PORTION OF SAID SURFACES BEING WITHIN THE OUTER PERIPHERAL DIMENSION OF THE STAKING TEETH AND SERVING TO LIMIT THE PENETRATION OF THE STAKING PORTION INTO THE MATERIAL OF THE PLATE.