Our Grade 8 Fine Hex Cap Screws are designed for maximum strength and durability. Made from heavy-duty alloy steel, our 5/8" Diameter Hex Cap Screws are heat-treated and tempered for superior hardness and quality. Our Grade 8 screws have a minimum tensile strength of 150,000 psi for reliable torqueing and fastening. Enjoy precision and performance with Grade 8 Fine Hex Cap Screws.