Glad you answered LAB. I didn’t want to walk out to the barn to check. I knew it was either a 1/2” or 9/16” but couldn’t remember off the top of my head. I used a deep well when I took mine off but could’ve got by with a regular socket n extension. I would recommend a 6 point socket because if it’s stuck a 12 point might slip. Mine’s a 77. Hope you get it n make sure you put that rubber plug back as that’s what kept mine from rusting. Gene
Hi Mrcarb, Point brought up of rust on this bolt is a good one. Very common for it to rust solid & very hard to remove.
I recommend putting boat trailer grease on threads, both bolt & nut. Regular grease is better than nothing. Antiseize works but I’ve found it can effect lock but holding more than grease. I’ve never had nut back off with grease.
Putting washer & nut on screw driver & tip of screwdriver on bolt & let them slide onto bolt. Nut will balance on bolt. Then use socket to start nut.
Don’t over tighten nut. Washer tight to spacer tube can be too tight. Don