5/8"-11 x 3‑1/2" Heavy Hex Cap Screw – A307 Grade B, Coarse Thread (PT), Zinc CR+3 (U.S.A.)

High‑strength 5/8"-11 x 3‑1/2" A307 Grade B heavy hex cap screw, manufactured in the U.S.A. and finished with a Zinc CR+3 coating for enhanced corrosion resistance and long‑lasting durability. Features partial coarse threading (PT) for improved shear strength and secure load engagement, along with a heavy hex head that provides increased wrenching area and superior load distribution. Ideal for structural connections, construction applications, industrial equipment assembly, anchoring, and any task requiring reliable, high‑strength hardware with additional corrosion protection.