The 3/8" anchor solution approved for 3 ¼" concrete thickness: The Strong-Bolt 2 anchor can be installed in cracked concrete with a minimum thickness of 3 ¼"

3/8-24 x 1 3/4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (775)

10 x 1 Simpson Pancake-Head Screw - Square Drive 410 SS - Carton (1000)

61/64 x 6 Reduced Shank Drill Bit (1/2 Shank)

3/4-16 x 2 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20)

1-8 x 9 A307A Hex Bolt Zinc Plated 1-14 Grade 8 Hex Cap Screws Yellow Zinc Plated The 3/8" anchor solution approved1 8 x 9 A307A Hex Bolt Zinc Plated . A307A Hex Bolts are manufactured from low carbon steel, typically 1015 1022. Our A307A bolting meets or exceeds ASTM A307 Grade A. Material is manufactured with rolled threads. Zinc plated material meets or exceeds ASTM F1941. Tensile strength will meet or exceed 60,000 psi.