ApplianPar Angle Grinder Inner Outer Flange Lock Nut for Black & Decker Dewalt Ryobi Milwaukee Makita 224399-1 193465-4 224568-4 Metal Set of 2 - Amazon.com
Tacoma Screw Products | Milwaukee 44-40-0035 4-1/2" Sander/Grinder Accessory, Flange nut for 6148-30 and 2780-20