1"-8 x 4" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 1"-8 x 4" socket head cap screw is engineered from premium high‑strength alloy steel to deliver outstanding fastening performance in heavy machinery, structural steel construction, large equipment fabrication, and extreme‑duty industrial environments. The thermal black oxide finish enhances corrosion resistance, improves lubricity, and provides a clean, uniform, low‑glare appearance while maintaining strict dimensional tolerances.Featuring a heavy‑duty hex socket drive for secure torque transfer and a strong, vibration‑resistant fit, this extra‑long fastener is ideal for high‑load applications requiring maximum strength, stable alignment, and long‑term durability. Its American‑made construction ensures clean, consistent threading, exceptional mechanical integrity, and dependable service life under the harshest operating conditions.