1/2"-13x4,(PT) USA Grade 8 Hex Head Cap Screw, ZINC Yellow CR+3 Bake (INCH) (Quantity: 25) Size: 1/2"-13 | Length: 4" | | Partially Threaded

Protected by a Yellow Zinc CR+3 Finish for maximum corrosion resistance Core Hardness - 1/4 through 1-1/2 in. diameter, all lengths: Rockwell C33 - C39. Surface Hardness - 1/4 through 1-1/2 in. diameter, all lengths: Rockwell 30N58.6 maximum. Proof Load - 1/4 through 1-1/2 in. diameter, all lengths: 120,000 psi. Yield Strength* - 1/4 through 1-1/2 in. diameter, all lengths: 130,000 psi. minimum Tensile Strength - 1/4 through 1-1/2 in. diameter, all lengths: 150,000 psi. minimum Elongation* - 12% minimum (all diameters)

• Hex Cap Screws (Hex Head Bolts). MADE IN USA. DOMESTIC
• A cap screw made from medium carbon alloy steel and heat-treated.
• Grade-8 exceeds the strength of a Grade-203
• Designed for use in high stress applications.
• Grade-8 cap screws shall be heat-treated, oil-quenched and tempered at a minimum temperature of 800°F.