6-20 x 1 1/4 Phillips Flat Self Drill Screw 410 SS

6-20 x 1 1/4 Phillips Flat Self Drill Screw 410 SS . These flat head self drilling screws in 410 stainless steel are used for a variety of applications including attaching materials to metal up to 12 gauge in thickness. 410 stainless provides both corrosion resistance and the hardness required for drilling through steel.