DOP712-3004 MTD Hex Flange Lock Nut No. 712-3004. This is an origional MTD flange nut that measures 5/16-18 and replaces MTD part numbers 01000635, 1732499, 1818112, 1904582, 712-3004, 7123004A, GW-37010, GW-7123004A, GW-92017, GW-B1732499, HG-43064, IH-938017-R1, 753-04056, 912-3004A, GW-1732499, GW-1904582, GW-325274, GW-37-010, and WD-131-911