Bolt Protector Spacer 3/8 in - Zinc Plated Steel
I could not use as the hole size and overall size was too small. My fault should have measured my application under the truck more carefully.
Well made, shipped promptly, but too small for the bolt head. I wanted to use these for penta headed security bolts, but I guess said bolt heads are larger than normal ones.
Second vehicle I've bought these for.
Did wonderful at Sand Hollow keeping the rock rings from getting chewed up