Grade 5 Zinc Yellow Plated Steel Hex Head Cap Screws

5/8-11 x 6" Long Grade 5 Zinc Yellow Plated Steel Hex Head Cap Screws

• Description: A cap screw made from medium carbon steel and heat-treated.
• Applications/Advantages: Has greater tensile strength than a Grade-2. Yield-to-tensile ratio is the lowest of all heat treated steels.
• Heat Treatment: Grade-5 cap screws shall be heat treated, oil or water quenched, at the option of the manufacturer, and tempered at a minimum tempering temperature of 800°F.
• Material: Medium carbon steel. Use of an alloy steel is also acceptable.
• Core Hardness: 1/4 through 1 in. diameter, all lengths: Rockwell C25 - C34. 1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell C19 - C30.
• Surface Hardness: 1/4 through 1 in. diameter, all lengths: Rockwell 30N54 maximum. 1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell 30N50 maximum.
• Proof Load: 1/4 through 1 in. diameter, all lengths: 85,000 psi. 1-1/8 through 1-1/2 in. diameter, all lengths: 74,000 psi.
• Yield Strength*: 1/4 through 1 in. diameter, all lengths: 92,000 psi. minimum 1-1/8 through 1-1/2 in. diameter, all lengths: 81,000 psi. minimum
• Tensile Strength: 1/4 through 1 in. diameter, all lengths: 120,000 psi. minimum 1-1/8 through 1-1/2 in. diameter, all lengths: 105,000 psi. minimum
• Elongation*: 14% minimum (all diameters)
• Reduction of Area*: 35% minimum (all sizes)