hardness will range from HRC 31-39

3/4-10 x 2 3/4 Hex Cap Screw SS 18-8 (A2)

1-14 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated

stucco and wood

3/4-10 x 4 1/2 Hex Cap Screw SS 18-8 (A2)

31/64 Heavy Duty Jobber Drill Bit (6) 1-8 Hex Cap Screws 18-8 Stainless Steel hardness will range from HRC31 64 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.