Galvanized nuts are over tapped per ASTM A563

7/16 L9 SAE Tension Flatwasher Yellow Zinc Plated Domestic USA (50)

1-8 x 9 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (8)

3/8-16 x 3 1/2 Hex Tap Bolt Silicon Bronze

#16 x 6 High Speed Aircraft Bit Cobalt

3/8-24 x 1 1/4 Grade 5 Hex Cap Screw Plain Domestic USA (100) Phillips Flat Undercut Machine Screws Black Zinc Plated Galvanized nuts are over tapped3 8 24 x 1 1 4 Grade 5 Hex Cap Screw Plain 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 of