S-94705A799 1 1/8"-8 x 3" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 125,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion and wear resistance thanks to ASTM Grade B7 steel construction and Rockwell C35 hardness
• Maximum grip and vibration resistance achieved through fully threaded design along the entire 3" length
• Precise, secure fastening with UN fine threading and Class 2A fit ensuring consistent engagement and reduced loosening
• Easy installation and removal with standard external hex drive and 1 13/16" head width for common tool compatibility
• Heavy-duty industrial compliance meeting ASTM A193 specifications for demanding environments
• Optimized for right-hand thread applications providing familiar installation in standard machinery and equipment

Professional Applications & Engineering Value

This Grade B7 steel hex head screw delivers critical engineering solutions where failure is not an option. The combination of 125,000 psi tensile strength and Rockwell C35 hardness provides exceptional resistance to stretching, shear forces, and material fatigue in heavy machinery, structural steel connections, and pressure vessel assemblies. The fully threaded design maximizes surface contact area, distributing stress evenly to prevent localized failure points. With UN fine threading and Class 2A fit, this fastener maintains precise tolerances in vibrating environments where coarse threads might loosen, making it ideal for industrial equipment, construction infrastructure, and energy sector applications requiring ASTM A193 compliance.

Specification Summary & Compliance

This 1 1/8"-8 hex head screw features Class 2A thread fit precision with UN fine threading standards, ensuring consistent engagement and interchangeability. Manufactured to meet ASTM A193 specifications for high-temperature service and ASTM Grade B7 material requirements, the fastener delivers reliable performance in demanding industrial environments. The 3" fully threaded configuration maintains uniform strength characteristics throughout the entire length, while the standard external hex drive and right-hand thread direction provide compatibility with common installation tools and procedures.