the hardness rating is HRC 24-35

Lag screws longer than 12 inches will have a minimum thread length of 50% of the screw length up to a maximum of 8 inches

1/2-13 x 3 Hex Sleeve Anchor Zinc Plated (25)

1/4 x 2 Flat Split Drive Anchor Zinc Plated (100)

5/8-11 x 2 1/2 Hex Cap Screw SS 316 (A4)

1/16 Cobalt Heavy Duty Jobber Drill Bit (12) Flat Washers Silicon Bronze the hardness rating is HRC1 16 Cobalt Heavy Duty Jobber Drill Bit . Heavy duty construction made to Type J aircraft specifications. Used for drilling holes in hard, tough materials such as stainless steel, titanium, high temperature and high strength alloys. High red hardness of cobalt permits speeds 30% greater than standard heavy duty split point (HSS) drills.