Flange
Grinding Wheel Flange, For Use With 4 1/2 in and 5 in Sander/Grinders, Diamond Blades, Type 1 Wheels, Number of Pieces 1, Compatible with Manufacturer Part Number 6148-6, 6149-20, 6151, Compatible with Grainger Part Number 4GC31, 5M624, 5M626, Size 1 11/16 in, Application Retaining of Nuts, Features Replacement Flange.