EQUIPMENT DESCRIPTION: REAR WHEEL HUB ASSEMBLIES FOR AFTERMARKET AUTOMOBILE REPLACEMENT PARTS. PART NOS. 512000, 512001, 513012, 512000V, 512001V, 512002V, 513012V; CHICAGO RAWHIDE PART NOS.: BR930053, BR930070, BR930089, BR930093, AND GBR930093 MANUFACTURED BETWEEN MAY 1, 1999, AND AUGUST 31, 2000. THESE HUB ASSEMBLIES HAVE A HIGH STRESS CONCENTRATION AT THE SHOULDER CORNER RADIUS WHICH INITIATES FATIGUE CRACKING. FAILURE OCCURS WHEN THE CRACK GROWS TO THE POINT WHERE THE SPINDLE FRACTURES SUDDENLY. THE REAR WHEEL OF THE VEHICLE ATTACHES DIRECTLY TO THE SUBJECT HUB.