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

2-4 1/2 x 16 Socket Cap Screw Alloy

3/4 x 14 Hex Lag Screw Hot Dipped Galvanized

3/8 x 4 Titen HD Concrete Anchor Zinc Plated (50)

#56 Heavy Duty Jobber Drill Bit

9/16-12 x 3 1/2 Hex Cap Screw SS 18-8 (A2) 3/4-10 A307 Grade A Carriage Bolts Zinc Plated A307 Grade A Carriage Bolts9 16 12 x 3 1 2 Hex Cap Screw SS 18 8 (A2) . 18 8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel. These percentages exist in 303, 304 and 305 series stainless steels so 18 8 is used at times to designate any and all of those alloy groups. 18 8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments. They are also acceptable for use in ACQ