Does this box come with mounting hardware for my truck bed?

Hardware is not included — you'll need to source bolts, washers, and brackets to match your bed rail or frame attachment points. Test-fit the box against your truck first to confirm bolt hole alignment before purchasing fasteners.

Will the aluminum need primer or paint before I install it?

The aluminum comes ready to mount as-is. If you want to paint or powder-coat it for color matching, sand the surface lightly and use a primer rated for non-ferrous metals, then topcoat with automotive paint.

Can I access the box from the top, or does it open from the side?

Opening orientation is not specified in the product data — contact support or refer to the manufacturer diagram when you receive it to confirm lid placement before mounting.