Conquest A563 grade DH heavy hex nuts are designed for high-strength structural uses. These nuts should be paired with A325, F3125, and A490 bolts to create a robust, high-strength connection. Available in either a plain or hot dip galvanized finish, enhanced with blue dyed wax for extra corrosion protection, these nuts meet stringent quality standards. When used with Conquest DTI washers, the installer can achieve the correct tension specifications when tightening.