The Lone Star 5/8'-11 UNC × 4-1/2' ASTM A193 Grade B7 Stud Bolt Assembly is a premium high-strength fastening solution designed for critical bolted flange joints in demanding industrial applications. Manufactured from heat-treated chromium-molybdenum alloy steel in accordance with ASTM A193 Grade B7, and supplied complete with two ASTM A194 Grade 2H heavy hex nuts, this stud bolt assembly delivers outstanding tensile strength, durability, and reliable clamping performance under high-pressure and high-temperature operating conditions. The zinc dull base coating with Xylan® 1070 blue fluoropolymer finish provides enhanced corrosion resistance, reduced friction, and excellent anti-galling properties, ensuring consistent preload and extended service life in harsh environments. Ideal for use in the oil and gas, petrochemical, power generation, marine, and process industries, the assembly is well suited for pressure vessels, pipelines, valves, heat exchangers, and critical flange connections where long-term reliability and performance are essential.