What mounting hardware do I need to install this?

Mounting hardware is not specified. You'll need to verify your truck bed or trailer sidewall has compatible mounting points and plan for fasteners accordingly — test-fit before committing to your method.

Will this box fit a standard full-size truck bed?

At 47 inches long, it's sized for most truck beds and trailer sidewalls, but confirm your specific mounting surface before ordering.

Does aluminum need any prep or protective coating after purchase?

The aluminum is ready to install out of the box. No painting or primer required. The diamond tread finish provides corrosion resistance, though you can apply protective wax or sealant if you want extra protection against salt or harsh conditions.