1/4-20X1 7/16 A/F Hd Hgt.172-.190 Unslotted Ind Hex Washer Serrate Self Drill Full Thread #2 Zinc (Pack Qty 2,500) BC-141607KWSMS2

The 18-8 stainless drill screw offers superior corrosion resistance but is a significantly softer metal than case-hardened carbon steel. The serrations can help create a fastening more resistant to loosening. The hardness of the material to be drilled should be a minimum of 10-20 Rockwell hardness points less than the screw’s hardness 18-8 Stainless Steel