Looking at the Sears site it seems the bolts are listed separately.

The replacement mandrel housing most likely is designed to use self-tapping replacement bolts.

Did you look up and but the parts from Sears Parts or from a third party online seller?

Call whoever you bought the housing from and tell them you need the bolts for that housing they sold you.

The bolts are 5/16" self tapping w/ flanged head. Any shop should have them. Nothing keeping you from threading the spindle and capping the bolts w/ lock nuts. Use a flat washer at the bolt head if you do this.

Thank you gentlemen; I got everything from Sears Parts but great to know I can get the bolts locally. Happy Mowing, Sharon

I did what tomplum said....worked fine, probably better than the original set up....not hard to thread it...

It's never hard to thread a steel self-tapping bolt into pot metal housings.

A dab on Anti-Seize on those self-tapping bolts will make them easy to remove the next time.