S-8077A876 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction and Black Oxide finish, ideal for harsh environments and extended service life.
• Superior mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in heavy-duty applications.
• Precise alignment and smooth rotation ensured by the standard shoulder fit and knurled head for secure handling during installation.
• High-strength thread engagement with Class 3A fit and coarse UNC threading, providing excellent vibration resistance and load distribution.
• Easy installation and removal facilitated by the 1/2" hex socket drive, allowing for high torque application without slippage.
• Dimensional stability and durability backed by Rockwell B79 hardness and tight tolerances on shoulder diameter and length.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This heavy-duty shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and structural assemblies where alignment, corrosion resistance, and high load capacity are paramount. The 316 Stainless Steel material, combined with a Black Oxide finish, provides excellent protection against corrosive elements, reducing maintenance needs in industries like marine, chemical processing, and outdoor equipment. The UNC coarse thread and Class 3A thread fit ensure secure fastening under dynamic loads, minimizing loosening in high-vibration environments. With a robust 1-1/2" shoulder length and knurled head, it facilitates precise component positioning and easy manual adjustment, enhancing assembly efficiency and reliability in industrial applications such as pivots, bearings, and guide mechanisms.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent fit and performance. It adheres to ASME B18.3 specifications for socket head shoulder screws, with Class 3A thread fit for high-strength applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence for industrial use.