your screws require a stronger hold to resist gradual loosening and sudden breakage due to the excessive weight of the items they’re helping to support

13/64 Heavy Duty Jobber Drill Bit

5/16-18 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (50)

7/16-14 x 2 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (50)

1/2-13 x 4 1/2 Socket Set Screw Cup Point Alloy

7/8-14 x 3 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (15) 1-8 Grade 5 Hex Cap Screws Plain - Domestic USA your screws require a stronger7 8 14 x 3 1 2 Grade 5 Hex Cap Screw Plain Domestic USA (15). 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