Help with Ryobi BT3000 table saw

[Al DeRemigis]

Can anyone help me locate a 5/8-18 arbor nut for a Ryobi BT3000 table saw? I was changing out the blade on my 25 year old saw and the nut cracked in half. Apparently a standard 5/8-18 nut doesn't work because I can't get it to turn past the first thread on the spindle. The saw still works well and I would hate to have to drop $600 on a new saw just because I can't get an arbor nut for this one. Would appreciate any help.

[Aaron Rosenthal]

Welcome to the site.
The reason you cannot get a new nut on the arbor is probably because the threads are Acme type (square at the top, not tapered).
You have options: search using your favorite engine on line for Ryobi parts, or see if you can take the old nut to a machine shop and they could make you another.

[Jim A. Moore]

Is this what you are looking for: https://www.ereplacementparts.com/hex-nut-5818-p-149356.html