A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A

2-8 A194 2H Heavy Hex Nut Plain

1-8 x 4 Grade 5 Hex Cap Screw Zinc Plated

3/4 x 12 Hex Lag Screw Zinc Plated

5/8-18 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated

9/32 Heavy Duty Jobber Drill Bit (12) 5/8-11 Socket Cap Screws Alloy A307 Grade A Carriage Bolts9 32 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.