S-8077A528 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments and extended service life.
• High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precision alignment and smooth rotation ensured by the 7" shoulder with tight tolerances, reducing wear on mating components.
• Secure and efficient installation with a knurled socket head and 3/8" hex drive, providing excellent grip and torque transmission.
• Accurate and durable threading through 5/8"-11 UNC Class 3A coarse threads, offering robust fastening and vibration resistance.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.
• Enhanced durability with Rockwell B79 hardness, maintaining integrity under repetitive stress and mechanical loads.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial assemblies, such as misalignment, component wear, and corrosion-induced failure. The black oxide finish enhances its resistance to moisture and chemicals, making it suitable for applications in machinery, automotive, and marine environments. The 7" precision shoulder provides a consistent pivot or spacer, reducing friction and ensuring smooth rotational movement in linkages, bearings, and pivoting mechanisms. With UNC coarse threads and Class 3A fit, it offers reliable fastening in high-vibration settings, while the knurled socket head allows for secure tool engagement during installation. Ideal for heavy-duty fastening in construction equipment and manufacturing systems, this component delivers long-term performance and minimizes maintenance downtime.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter of 3/4" with tolerance of -0.004" to -0.002" and shoulder length of 7" with tolerance of -0.005" to 0.005". Thread specifications adhere to 5/8"-11 UNC Class 3A for accurate fit and high strength. It conforms 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 material reliability.