Patent ID: 7892257

Claim:
An assembly comprising: a screw head comprising: an outwardly protruding and expandable bulbous end comprising a plurality of flanges and an inner portion, wherein said inner portion comprises a channel bored through said bulbous end; a slot adapted to receive a longitudinal member; and a pair of opposed upright ends separated by said slot, wherein each of the opposed upright ends comprises an inner wall and an outer wall, wherein said inner wall comprises wall threads, and wherein said outer wall comprises grooves; a fixator component that receives the bulbous end of said screw head; a load sharing mechanism positioned in between said bulbous end of said screw head and said fixator component, wherein said load sharing mechanism provides tensile resistance to said screw head; a pin mounted within an inner portion of said screw head and expanding said flanges of said bulbous end, wherein said pin sits in said channel; and a blocker that engages said screw head and comprises blocker threads that mate with said wall threads.