Looking for the carriage bolts for an M9540dt tractor. that hold the front wheel rim to the front wheel disc. They are a carriage head style bolt the nut take a 24M wrench. The approximate fractional size would be 9/16" by about 3 1/4" (True size being metric I am sure). Talked to my dealer and he could not find them on his parts book charts. Thnx Tims