1 1/4-12 x 6 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (18)

7 for torsional strength and drill speed

#24 Heavy Duty Drill Bit - Stubby Length

1/16 Heavy Duty Jobber Drill Bit

3/8-16 x 3 1/4 Grade 5 Hex Cap Screw Plain Domestic USA (325)

3/8-24 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) 5/16-18 Grade 5 Hex Cap Screws Zinc Plated - Domestic USA 1 1/4-12 x 6 L93 8 24 x 2 3 4 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