3/4-10 x 12 A307 Grade A Carriage Bolt HDG

3/8 Heavy Duty Jobber Drill Bit

17/64 Cobalt Heavy Duty Jobber Drill Bit

#4 Heavy Duty Drill Bit - Stubby Length

Hot-Dip Galvanized material will meet or exceed ASTM A563

#37 Heavy Duty Jobber Drill Bit (12) 5/16-24 Socket Cap Screws Alloy 3/4-10 x 12 A307 Grade#37 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.