By utilizing a reliable Alligator anchor to supplement your screws

Standard (ANSI) fractional anchor: Fit

1/2-20 x 6 Grade 8 Hex Cap Screw Plain Domestic USA (25)

#31 Heavy Duty Drill Bit - Stubby Length

1 5/32 x 6 Reduced Shank Drill Bit (1/2 Shank)

9/16-18 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (25) 7/8-9 Hex Cap Screws 316 Stainless Steel By utilizing a reliable Alligator9 16 18 x 4 1 2 Grade 5 Hex Cap Screw Plain 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 of