All of our new parts are aftermarket replacements. Compatible with John Deere Tillage(s) NU1036, NU1046, NU1048. Replaces John Deere OEM Number(s) A15594, A51081, AA14883. Replaces Mfg Number(s) WD3 WIESE, DNUSHIN. Compatible with John Deere New Universal (NU) Plow(s): NU1056. Bolt Hole Dimensions: 7/16. Plow Size: 16″ / 18″. All States Ag Parts Item No.