S-8077A134 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance in heavy-duty applications.
• Precision fit and alignment ensured by Class 3A thread fit and a standard shoulder fit, reducing assembly play and improving component stability.
• Enhanced grip and torque application from the knurled head and 1/2" hex drive, allowing for secure handling and high-torque installation without slippage.
• Durable wear and oxidation protection provided by the Black Oxide finish, which minimizes surface degradation and maintains a consistent appearance.
• Broad regulatory compliance including RoHS 3 and REACH, ensuring safety and environmental standards are met for global industrial use.
• Optimized for high-stress applications with a coarse UNC thread and robust shoulder design, delivering reliable fastening under extreme loads.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw with a Black Oxide finish is engineered to address critical challenges in demanding sectors such as machinery assembly, automotive systems, and precision equipment. The coarse 3/4"-10 UNC thread and Class 3A fit provide excellent vibration resistance and quick assembly, reducing downtime in production lines. The knurled head and hex drive enhance torque transmission, preventing tool slippage during high-stress installations. With a 1" shoulder diameter and tight tolerances, it ensures precise alignment in rotating parts or bearing mounts, minimizing wear and operational failures. Ideal for environments exposed to moisture, chemicals, or high loads, this fastener combines durability with compliance to ASME B18.3 standards, offering a reliable solution for engineers seeking long-term performance and corrosion resistance.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, featuring a 3/4"-10 UNC Class 3A thread with precise diameter and length tolerances (e.g., shoulder diameter tolerance of -0.004" to -0.002"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The mechanical properties include a tensile strength of 70,000 psi and Rockwell B79 hardness, supporting consistent performance in industrial applications.