Brass screws, while pretty, are not really suitable for boat construction. Galvanic action will reduce them to dust in a few years. So what are they doing here? Honestly, we got them specifically to go with the brass cleats that we sell so often to folks who want them for drawer pulls or other ornamental uses.
The #8 screws are a good fit for our 3" Brass Cleats and the #10 x 1-1/2" ones work best with the 4" Cleats.