Hardness of RC 38-43

1-8 x 7 Grade 8 Hex Cap Screw Yellow Zinc Plated

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The short length enables shallow embedment that helps avoid drilling into rebar or prestressing strands

#11 Heavy Duty Jobber Drill Bit (12) Drop-In Anchor Setting Tools - Clearance Hardness of RC 38-43#11 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.