When I removed the dash shield (#3638) in my 1915 roadster I found that it had been installed with a creative variety of fasteners, including one self-tapping sheet metal screw. What's correct? I haven't found any reference in the usual places.
Three round head wood screws.
John Regan can tell you exactly what size and whether they should be brass or steel for 1915.
I sent you a PM concerning your question.
Dad used all kinds of Phillips screws he had on hand, but I don't remember him ever having a '15 Runabout.