1"-8 x 5‑1/2" Socket Head Cap Screw, Alloy Steel, Thermal Black Oxide (USA)

This USA‑made 1"-8 x 5‑1/2" socket head cap screw is manufactured from premium high‑strength alloy steel to deliver exceptional fastening performance in heavy machinery, structural steel connections, industrial equipment builds, and other extreme‑duty applications. The thermal black oxide finish increases corrosion resistance, enhances lubricity, and provides a smooth, uniform, low‑glare appearance while maintaining strict dimensional tolerances for precision assembly.Designed with 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 reliability. Its American‑made construction ensures clean, consistent threading, outstanding mechanical integrity, and durable performance even under the harshest operating conditions.