Grade A Heavy Hex Nuts are manufactured from low carbon steel

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

1-14 x 2 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

9 x 3 1/2 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - Bulk Pail (1500)

5/8-11 x 12 Carriage Bolt SS 18-8 (A2)

9/16-12 x 2 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) Finished Hex Nuts 18-8 Stainless Steel Grade A Heavy Hex Nuts9 16 12 x 2 1 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) . 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