Can the 1-1/2 in. Wood Screw #10 Galvanized Hex-Head Roof Accessory work to secure metal flashing on a composite shingle roof?

We suggest testing with 1-1/2 inch or 2 inch fastener with rubber grommet.

These fasteners have been used to secure metal roofing to a shingle roof on the low side of the panels and 2” fasteners through the ribs for over lap. As for metal flashing not knowing the application and type of shingle it becomes more trial and error. We suggest testing with 1-1/2” or 2” fastener with rubber grommet.