Bad Boy OEM 018-6020-00 Blade Bolt 5/8"-18 X 1-1/2" GR 8 Hex

as good as it gets, the are doing the job

Mower blade bolts

Exactly what I needed

5/8"-18 X 1-1/2" GR 8 Hex bolts

Bolts 5/8"-18 X 1-1/2" GR 8 Hex. They seem to be holding the blades on pretty good 😁.