Engineered for efficiency and reliability, this self-tapping screw features a square drive that not only allows for greater torque during installation but also minimizes the possibility of slippage. Crafted from AISI 1016 steel with a case-hardened surface achieving a minimum Rockwell Hardness of C45, these screws are designed to tap their own mating internal thread in metallic materials, eliminating the need for preformed holes in wood. Additionally, they are zinc plated to meet ASTM Specification F1941, ensuring durability and resistance against corrosion. With a fully threaded design and conforming to ASME B18.6.3 dimensions, this pack of 100 screws is an indispensable addition to any toolkit, perfect for a variety of fastening applications.