To clear up any confusion, structural screws ARE bolts, but you probably already figured that out.
A325 is the "high strength" designation.
H.D.G. stands for hot dipped galvanized.
3/4 inch diameter, 10 threads per inch, 2 inches long.
Am I the only one wondering … if screws are bolts — why not just call them bolts?
All together now: It's all a little nutty!