5/8"-11 x 4" Heavy Hex Cap Screw – A307 Grade B, Coarse Thread (PT), Zinc CR+3 (U.S.A.)

High‑strength 5/8"-11 x 4" A307 Grade B heavy hex cap screw, proudly manufactured in the U.S.A. and finished with a Zinc CR+3 coating to provide enhanced corrosion resistance and long‑term durability in demanding environments. Features partial coarse threading (PT) for improved shear strength and secure load engagement, paired with a heavy hex head that offers increased wrenching area and superior load distribution. Ideal for construction, industrial assembly, structural connections, anchoring applications, and any project requiring tough, reliable hardware with added corrosion protection.