5/16-18 Grade 2 Finished Hex Nut – Hot-Dip Galvanized

5/16-18 Grade 2 Finished Hex Nut Hot Dipped Galvanized . Grade 2 Finished Hex Nuts are manufactured from low carbon steel, 1008-1010 for diameters up to 1 inch (cold-formed) and 1045 steel for diameters over 1 inch (hot-formed). Material is manufactured to meet or exceed ASTM A563 Grade A. Zinc plated material will meet or exceed ASTM F1941. Hot-Dip Galvanized material will meet or exceed ASTM A563. Hot-Dip Galvanized nuts are over tapped per ASTM A563. Hardness requirements of HRB 68 - HRC 32 are met or exceeded. Proof load strength of 90,000 psi minimum is met for plain or zinc plated material, 68,000 psi for Hot-Dip Galvanized material.

General Characteristics:

• Type: Six-sided threaded fastener.

• Size: 5/16 inch nominal diameter.

Dimensions:

• Thickness: Approximately (0.875D) (where (D) is the nominal size). For a 5/16" nut, this translates to approximately 0.273 inches.

• Width Across Flats: (1.5D), which is about 0.500 inches for a 5/16" nut.

For 5/16 inch hex nut:

• Basic Major Diameter: 0.3125 inches

• Width Across Flats: Max 0.500 inches, Min 0.489 inches

• Width Across Corners: Max 0.577 inches, Min 0.557 inches

• Thickness: Max 0.273 inches, Min 0.258 inches

Material Composition:

• Made from low carbon steel with the following chemical composition:

• Carbon: Maximum 0.47%

• Phosphorus: Maximum 0.12%

• Sulfur: Maximum 0.23%

Mechanical Properties:

• Tensile Strength: Minimum of 74,000 psi.

• Hardness: Rockwell hardness ranges from B68 to C32.

• Proof Load:

• Coarse thread: 68,000 psi

• Fine thread: 60,000 psi

Plating:

• Hot-dip galvanized coating provides enhanced corrosion resistance, making these nuts suitable for outdoor applications and environments exposed to moisture and corrosive elements