S-94705A776 7/8"-9 x 2 3/4" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 125,000 PSI ensures reliable performance under extreme mechanical loads
• High durability with Rockwell C35 hardness for superior wear resistance in demanding industrial environments
• Precision Class 2A thread fit guarantees smooth installation and secure fastening connections
• Coarse UNC threading provides rapid assembly and superior resistance to vibration loosening
• Full threading along the 2 3/4" length offers maximum adjustability and grip range
• External hex drive design enables high-torque application with standard tools
• ASTM A193 Grade B7 compliance ensures material quality and performance consistency

Professional Applications & Engineering Value

These Grade B7 steel hex head screws deliver critical performance where failure is not an option. The combination of 125,000 PSI tensile strength and Rockwell C35 hardness makes them ideal for pressure vessels, structural connections, and heavy machinery where high-strength fasteners must withstand extreme temperatures and stress. The coarse UNC thread pattern maintains integrity in high-vibration environments, while the external hex drive accommodates high torque requirements. Manufactured to ASTM A193 specifications, these fully threaded screws provide consistent performance in petrochemical, power generation, and industrial construction applications where reliability is paramount.

Specification Summary & Compliance

This 7/8"-9 UNC hex head screw features Class 2A thread fit tolerances for precise engagement, with right-hand coarse threading and 2 3/4" length. Manufactured from steel to ASTM A193 Grade B7 specifications, ensuring compliance with industry standards for high-temperature service. The fastener meets applicable material composition requirements and is suitable for applications demanding 125,000 PSI tensile strength and controlled hardness properties.