Torx Button Flange Screws eliminate the need for a separate washer.
The Torx socket provides higher torque transfer because the driving forces are transferred to each surface of the six lobes.
Class 8.8 Torx Flange screws are a medium strength fastening solution with a Zinc Plated finish for corrosion resistance. Stainless Steel is best for low strength applications that require corrosion resistance in damp environments.