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"

9/16-18 x 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (225)

1 1/4-7 x 4 1/2 Socket Cap Screw Alloy

6 x 3/4 Phillips Flat Particle Board Screw Plain & Lubed - Carton (20

High degree of corrosion resistance

5/8-18 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) 7/8-14 Grade 8 Hex Cap Screws Yellow Zinc Plated The 3/8" anchor solution approved5 8 18 x 2 3 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) . Grade 5 Hex Cap Screws are manufactured in the USA from medium carbon steel. Our Grade 5 material meets or exceeds SAE J429 Grade 5 specifications. All products are manufactured with rolled threads. Typical hardness on diameters 1 4 to 1 inch is HRC 25 34. On diameters over 1 inch to 1 1 2 hardness will range from HRC 19 30. Tensile strength for diameters 1 4 to 1 inch is a minimum