12-24X7/8 Unslotted Hex washer Self Drilling Screw #4 Point Full Thread 410 Stainless Steel (Pack Qty 1,500) BC-1214KWMS4410

AISI 1022 or equivalent steel: The unified thread pitch reduces friction and driving torques. Drill screws with this style thread are normally used with thicker materials, particularly when the materials being joined are thicker than a single spaced thread pitch. The reaming wings drill out a clearance hole in wood or other soft materials, then snap off when in contact with the metal surface to be drilled. The #4 point typically will drill through sheet metal from .145 to .312 inches thick 410 stainless steel: Offers similar advantages as the steel screw of the same design but with better corrosion resistance. It is important to remember that the hardness of the material to be drilled should be a minimum of 10-20 Rockwell hardness points LE