S-94705A788 1"-8 x 2 1/4" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional Durability - ASTM Grade B7 steel construction provides superior resistance to high-stress environments, ensuring long-term reliability in demanding applications.
• High Tensile Strength - With 125,000 psi tensile strength, this screw offers robust holding power for critical connections that require maximum load-bearing capacity.
• Optimized Thread Design - Fully threaded UNC coarse threads enable faster installation and enhanced grip in various materials, reducing assembly time.
• Precision Thread Fit - Class 2A thread fit ensures consistent, reliable engagement with mating components, minimizing the risk of loosening under vibration.
• Enhanced Hardness - Rockwell C35 hardness provides excellent wear resistance, maintaining thread integrity through repeated use.
• Versatile Drive Compatibility - External hex drive allows for easy torque application with standard tools, facilitating quick maintenance and adjustments.
• Industry Compliance - Meets ASTM A193 specifications, guaranteeing material quality and performance for industrial and engineering applications.

Professional Applications & Engineering Value

This 1"-8 UNC Grade B7 steel hex head screw is engineered to address critical challenges in high-pressure and high-temperature environments, such as petrochemical plants, power generation systems, and heavy machinery. The fully threaded coarse thread design ensures maximum surface contact and clamping force, preventing joint failure under dynamic loads. Made from ASTM Grade B7 steel, it maintains structural integrity in corrosive conditions, while the external hex drive simplifies installation and removal with common tools. Ideal for flanges, pressure vessels, and structural assemblies, this fastener delivers consistent performance where reliability is non-negotiable, reducing downtime and maintenance costs.

Specification Summary & Compliance

This product features a 1"-8 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring compatibility with standard nuts and tapped holes. It complies with ASTM A193 specifications for material and manufacturing standards, and meets general industry requirements for heavy-duty applications. The screw is fully threaded and right-hand oriented, with dimensions including a 2 1/4" length, 1 5/8" head width, and 39/64" head height, providing reliable performance in accordance with established engineering norms.