5/8-18 x 4 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (80)

Wings ream hole in board preventing "jacking action"

9/16-12 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (25)

9/16-12 x 2 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (25)

3/16 x 2 1/4 Slot Hex Hi-Low Thread Concrete Screws Blue Ceramic Coated (2500)

9/16-18 x 1 Grade 5 Hex Cap Screw Plain Domestic USA (25) M16-2.00 Hex Cap Screws DIN 931 18-8 Stainless Steel (A2) 5/8-18 x 4 1/2 Grade9 16 18 x 1 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 120,000