I've got a Sears Craftsman (Murray) 30" riding mower. Per the manual the replacement blade is a 56060HT.
Searching for this model online I'm getting many hits plus more that cross reference a newer series. Then comes the confusion factor as these blades often have different center hole sizes, .850", 7/8"x1" and 27/32. Even the original blade depending upon website may list any one of the three.
Are all three sizes truly interchangeable?