The knurled nuts (screenshot below) mentioned above are available at most of your local hardware stores for just a couple bucks.
Definitely easier to install than hex nuts with a wrench up inside the dash area!
Let us know what you end up using.
Dan
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
