18-8 stainless steel is best for applications where corrosion resistance is required

Conform to ASTM F837

8 DIN 931 Zinc Plated - Class 8

Coarse threads are designed for softer wood and cabinet framing assembly

Download Powers Drive® Pre-Expanded Anchor Technical Data

5/16-24 x 3 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) Square Bugle Coarse Drywall Screws Black Phosphate 18-8 stainless steel is best5 16 24 x 3 1 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) . 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