New 6in Bench Grinder 1/2-20 Arbor Nut Set (Replaces Baldor XY5020A12SP & XY5020A62SP). These are zinc-plated, grade 5 nuts (left-hand and right-hand) that hold the grinding wheels onto the ends of the armature assembly. See Baldor catalogue snippet.

This is commonly used on 6in Baldor bench grinders (610, 612, 612E, 612RE, 662, 662E, 662RE, 632, 632E, 632RE, 623, 623E, 623RE). These are also commonly used on a number of other 6in bench grinders, such as Rockwell, Craftsman, and so forth.

Check out more of my listings for Baldor parts and bench grinder accessories!