Typical hardness on diameters 1/4 to 1 inch is HRC 25-34

Nominal Size: 1 1/2 inch

Split anchor

3/4-10 x 8 Hex Cap Screw SS 316 (A4)

you may need toggle bolts for a specific purpose or just to have on hand as needed

#24 Heavy Duty Jobber Drill Bit (12) 1-14 Grade 5 Hex Cap Screws Zinc Plated Typical hardness on diameters 1/4#24 Heavy Duty Jobber Drill Bit . Web construction is heavier than general purpose construction making it particularly suitable for cotter pin hole drilling and cross hole drilling in head of bolts. The heavy construction affords efficient drilling in stainless steel and other hard materials. The split point reduces the thrust requirements and minimizes walking.