1/4-20X3/4 Phil Wafer Head #3 Point Self Drill Screw Mach Screw Thread Full Th 410 Stainless Steel (Pack Qty 1,000) BC-1412KWAFM410

Type BSD: The 18-8 stainless drill screw offers superior corrosion resistance while the 410 stainless screw will drill through harder material than the 18-8. The hardness of the material to be drilled should be a minimum of 10-20 Rockwell hardness points less than the screw’s hardness Minimum torques are the same for stainless and steel self-drill screws. Drill time is 2.5 seconds for a 1mm thick plate 410 or 18-8 stainless steel