I was selling these splash parts since I kind of completed a red/silver/black splash and these are the leftovers in a part box. After completing, I decided
I like to use flathead screws because the machining can be done with one operation instead of three. For example on a pan head screw you would have to
I would just counter sink the holes to proper depth, with the proper machining equipment it's the easiest route. All solutions are a matter of perspective.