7/8-9 X 4 1/4 F3125 GRADE A325 HEAVY HEX BOLT W/NUT, GALVANIZED US/CA

A325 Material Marking

DH Material Marking

Mechanical PropertiesA325 w/DH Nut

1. 1. To determine nut proof load in pounds, multiply the appropriate nut proof load stress by the tensile stress area of the thread.
2. 2. Non-zinc-coated nuts are nuts intended for use with externally threaded fasteners which have a plain (nonplated or noncoated) finish or have a plating or coating of insufficient thickness to necessitate overtapping the nut thread to provide assemblability. Zinc-coated nuts are nuts intended for use with externally threaded fasteners which are hot-dip zinc-coated, mechanically zinc-coated, or have a plating or coating of sufficient thickness to necessitate overtapping the nut thread to provide assemblability.
3. 3. Nuts made in accordance with the requirements of Specification A194/A194M, Grade 2H, and marked with its grade symbol are an acceptable equivalent for Grade DH nuts. When A194 zinc-coated inch series nuts are supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be in accordance with Specification A563.

Chemical PropertiesA325 w/DH Nut

1. 1. For Grade DH a sulfur content of 0.05 – 0.15 % is acceptable provided the manganese is 1.35 % min.

Dimensional SpecificationsA325 w/DH Nut

1. All dimensions are in inches.

1. All dimensions are in inches.