In Reply to: Hydro drive hub install-NAA posted by Mike N MI on February 26, 2012 at 10:25:10:
I have done that a couple different ways. I used an ordinary flat head cap screw and made a special washer to fit it. I also made a similar thin head screw from scratch and broached the hex key drive. Never thought of using a shell mill arbor screw: 5/8-18 Arbor Screw.

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