As the anchor is driven into the hole

12 x 2 1/2 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Box (100)

Removable and adjustable

7/8-9 x 7 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (45)

1 3/8-6 x 4 1/2 Socket Cap Screw Alloy

1/2-13 x 3 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) 5/8-11 Hex Cap Screws 316 Stainless Steel As the anchor is driven1 2 13 x 3 1 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