S-8077A531 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty load-bearing applications
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal risk of loosening
• Knurled head texture provides enhanced grip for manual adjustments and prevents slipping during installation
• Standard 3/8" hex drive allows for easy installation and removal with common tools, reducing assembly time
• Accurate shoulder dimensions with tight tolerances for consistent alignment and smooth rotational movement in machinery
• Full compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards are met

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 316 Stainless Steel material, combined with a Black Oxide finish, provides excellent resistance to corrosion, chemicals, and high-moisture conditions, extending service life in demanding applications like conveyor systems, automotive assemblies, and food processing equipment. The 1 1/2" shoulder length and precise diameter tolerances ensure accurate component positioning, reducing wear and misalignment. With a Class 3A thread fit and coarse UNC thread, it offers quick assembly and reliable performance under dynamic loads, minimizing maintenance downtime and enhancing operational efficiency in heavy-duty industrial applications.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC coarse thread with Class 3A fit for high precision, a shoulder diameter of 3/4" (tolerance: -0.004" to -0.002"), and shoulder length of 1 1/2" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional accuracy and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for global industrial use.