there is no secondary tightening operation required which greatly reduces the overall cost of an anchor installation

7/8-9 x 4 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

9/16 x 6 Reduced Shank Drill Bit (1/2 Shank)

A new plating that is 7x more corrosion resistant than standard zinc plating

3/4-10 x 7 Simpson Wedge Anchor 304 SS (10)

5/16 Cobalt Heavy Duty Jobber Drill Bit (6) 1-8 Hex Cap Screws 18-8 Stainless Steel there is no secondary tightening5 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.