Ship Auger Wood Drill Bits are heat treated with machine ground hollows

1-14 Slotted Hex Nut Zinc Plated

3/4-16 x 6 Hex Cap Screw SS 18-8 (A2)

1-8 x 5 Grade 5 Hex Cap Screw Zinc Plated

1 1/4-7 x 5 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (5)

7/8-14 x 3 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (45) Finished Hex Nuts Silicon Bronze Ship Auger Wood Drill Bits7 8 14 x 3 3 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (45) . 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