Self-countersinking nibs under head insure seating of screw head flush with work surface

#48 Heavy Duty Jobber Drill Bit

3/4-10 x 1 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20)

Exterior wood screws used in fencing

5/16-24 x 5/8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) 7/8-9 Grade 8 Hex Cap Screws Plain - Domestic USA Self-countersinking nibs under head insure5 16 24 x 5 8 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