Hot-dipped galvanized. Meets minimum physical requirements of ASTM A36. Anchor bolts are manufactured from 1006 to 1018 carbon steel (foreign and domestic) raw material. Plated according to ASTM 153 specifications and recommended for use with copper based treated lumber. Hot-dipped galvanized anchor bolts are recommended when working with treated lumber. 50 bolts per box with nuts and washers in each box.