S-8077A524 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.
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against rust and galling.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications.
• Precise alignment and smooth rotation thanks to the 3" shoulder with tight diameter tolerance, reducing bushing wear and vibration.
• Secure, slip-resistant installation with a knurled socket head and 3/8" hex drive, allowing for high torque application and easy handling.
• Accurate and reliable threading with Class 3A UNC coarse thread, ensuring consistent fit and reduced risk of cross-threading in assembly.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial machinery, automation systems, and precision equipment. The black oxide finish enhances corrosion resistance, making it suitable for humid or chemically aggressive settings, while the 5/8"-11 UNC thread with Class 3A fit ensures secure fastening without loosening under vibration. The 3" shoulder length provides a stable pivot or spacer, reducing friction and wear on moving parts like bearings and linkages. With a Rockwell B79 hardness and high tensile strength, it withstands heavy loads and repetitive stress, offering long-term reliability in assembly lines, robotic arms, and construction equipment.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring consistent performance. The UNC coarse thread adheres to Class 3A standards for tight fit, and manufacturing follows ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and industry best practices.