Right Hand Spindle Nut for inboard side of Delta Rockwell 12 Medium and Heavy Duty Lathes #'s:  23-980 Type 1 23-980 Type 2 46-204 Type 1 46-221 Type 1 46-221 Type 2 46-222 Type 1 46-222 Type 2 46-223 Type 1 46-223 Type 2 46-224 Type 1 46-224 Type 2 46-225 Type 1 46-225 Type 2 46-226 Type 1 46-226 Type 2 46-227 Type 1 46-227 Type 2 46-229 Type 1 46-229 Type 2 46-305 Type 1 46-541 Type 1 46-541 Type 2 46-542 Type 1 46-542 Type 2 46-543 Type 1 46-543 Type 2 46-544 Type 1 46-544 Type 2 46-546 Type 1 46-546 Type 2 46-547 Type 1 46-547 Type 2 46-548 Type 1 46-548 Type 2 46-549 Type 1 46-549 Type 2