NoCoRode ﾓPlusﾔ Plated Round Washer Head Screws Increased Bearing Area Is Ideal for Pressure-Treated Lumber Round Washer Head screws, with their larger bearing surface than flat head screws, are ideal for attaching surface mounted door hinges, hasps and other hardware or even for pocket hole joinery. These hardened steel screws have our NoCoRode ﾓPlusﾔ plating for economical corrosion-resistance, and are suitable for use in ACQ pressure treated materials. The #8 screws have patented, serrated threads near the tip of the screw to reduce wood splitting. Our #10 screws have our standard deep thread. Due to usage variables, we cannot guarantee these screws against corrosion. Use NoCoRode Undersized driver bits for best results. Made in Taiwan / China.