5/16-24 x 1 1/4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (100)

1-8 x 7 Socket Cap Screw Alloy

#31 Heavy Duty Jobber Drill Bit

1-8 x 4 3/4 Socket Cap Screw Alloy

consistent embedment and uniform rod lengths

1/4-20 x 3 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (600) 1/2-20 Hex Cap Screws 316 Stainless Steel 5/16-24 x 1 1/4 L91 4 20 x 3 1 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (600) . 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