S-8077A526 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 chemical exposure.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise alignment and reduced wear provided by the 5" shoulder with tight tolerances, ensuring smooth rotational movement in assemblies.
• Enhanced grip and tool engagement from the knurled socket head and 3/8" hex drive, preventing slippage during installation.
• Accurate and secure threading with Class 3A UNC coarse threads, facilitating faster assembly and high vibration resistance.
• Durable, wear-resistant surface thanks to the black oxide finish, which also minimizes light reflection in sensitive applications.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in industrial machinery and precision equipment. The 316 stainless steel material provides excellent resistance to corrosion and high temperatures, making it suitable for applications in chemical processing, marine, and food-grade environments. The 5-inch shoulder length acts as a precise pivot or axle, reducing bushing wear and maintaining alignment in rotating assemblies like conveyor systems, robotics, and printing presses. Combined with the black oxide finish, it offers added durability and a non-reflective surface. The Class 3A thread fit and coarse UNC threading ensure quick, secure fastening even in high-vibration settings, minimizing maintenance downtime and improving operational reliability.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit per UNC standards, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for high precision. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free of hazardous substances and safe for various industrial applications.