S-8077A771 1/2"-13 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 outdoor applications.
• Enhanced durability and wear resistance from the black oxide finish, providing a protective layer against abrasion and reducing galling.
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable performance under heavy-duty mechanical stress.
• Precise alignment and smooth rotation due to the Class 3A thread fit and standard shoulder fit, minimizing play in assemblies.
• Secure, non-slip installation with the knurled socket head and 5/16" hex drive, allowing for high-torque application without tool slippage.
• Broad compatibility and easy assembly with 1/2"-13 UNC coarse threads, designed for quick engagement in various industrial components.
• Compliance with stringent industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The black oxide finish not only enhances corrosion resistance but also reduces friction, making it ideal for high-stress applications in machinery, automotive, and aerospace sectors. The UNC coarse thread and Class 3A fit ensure quick, secure fastening in assemblies requiring precise shoulder positioning, such as pivots, guides, and rotating components. Its high tensile and shear strength provides reliable performance in dynamic loads, while the knurled head and hex drive facilitate easy installation in confined spaces, reducing assembly time and improving operational efficiency.

Specification Summary & Compliance

This shoulder screw features precise dimensions including a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"), with Class 3A thread fit for high accuracy. It adheres to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry reliability.