Galvanized nuts are over tapped per ASTM A563

The anchor can be used in concrete

7/8-9 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (15)

3/4-10 Cap Nut 18-8 SS

1/4-20 x 1 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) 7/8-9 Hex Cap Screws 316 Stainless Steel Galvanized nuts are over tapped1 4 20 x 1 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) . 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 of