S-8077A523 5/8"-11 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
• Enhanced durability and wear resistance from the black oxide finish, providing reliable performance under demanding conditions
• High-strength reliability with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring secure fastening in critical applications
• Precise alignment and smooth rotation offered by the 2" shoulder length with tight tolerances, reducing component wear
• Secure, non-slip installation facilitated by the knurled socket head and 3/8" hex drive, allowing for high-torque applications
• Quick assembly and disassembly with 5/8"-11 UNC coarse right-hand threads and Class 3A fit, ensuring consistent engagement
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The black oxide finish enhances surface durability, reducing friction and wear in moving assemblies like machinery linkages, conveyor systems, and precision instruments. Its coarse UNC threads and Class 3A fit provide reliable threading in materials where vibration resistance is critical, while the 2" shoulder acts as a precise pivot or spacer, minimizing bushing wear and simplifying maintenance. Ideal for industrial fastener applications in manufacturing, automotive, and marine sectors, it ensures long-term performance even in corrosive or high-load environments.

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. Thread specifications include a 5/8"-11 UNC coarse thread with Class 3A fit for high accuracy. It complies with ASME B18.3 manufacturing standards, RoHS 3 (2015/863/EU) for restricted substances, and REACH (EC 1907/2006) regulations, guaranteeing quality and environmental safety in industrial use.