3X1/4 Round Head Type U Drive Screw Zinc (Pack Qty 10,000) BC-0304U

For making permanent fastenings in metals and plastics, when forced into the work under pressure Steel: AISI 1016 - 1024 or equivalent steel: Drive screws shall produce mating threads without shearing of threads or fracture of the screw when driven into properly sized holes in test plates having a Rockwell hardness of B70 to B85 18-8 Stainless Steel: Not recommended for use in materials of a hardness greater than Rockwell B 65You may also like M8-1.25X40 Din 7985 A Metric Phil Pan Machine Screw Full Thread 18-8 Stainless Steel Black Oxide (Pack Qty 400) BC-M840MPP188B.