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

which means you can place them close to each other without having to worry about compromising structural integrity

7/8-9 x 2 3/4 Hex Cap Screw SS 18-8 (A2)

5/8-11 x 5 1/4 Hex Cap Screw SS 18-8 (A2)

7/8-9 x 1 3/4 Grade 8 Hex Cap Screw Plain Domestic USA (80) M22-2.50 Socket Cap Screws 12.9 Alloy Plain DIN 912 A307 Grade A Carriage Bolts7 8 9 x 1 3 4 Grade 8 Hex Cap Screw Plain Domestic USA (80). Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on diameters 1 4