S-8077A361 8-32 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 and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precision alignment and smooth rotation ensured by the 1-1/2" shoulder with tight diameter and length tolerances for consistent assembly.
• Secure, high-precision threading with Class 3A UNC coarse thread fit, providing excellent vibration resistance and load distribution.
• Easy installation and removal using a standard hex drive socket and knurled head for improved grip and torque application.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Versatile right-hand thread design suitable for a wide range of machinery, pivots, and rotating assemblies.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 316 Stainless Steel material, combined with a Black Oxide finish, provides outstanding resistance to corrosion and wear, making it suitable for applications in chemical processing, marine equipment, and food machinery. The 1-1/2" shoulder length with precise tolerances ensures accurate component spacing and smooth rotational movement, reducing friction and premature failure in pivots, linkages, and bearing assemblies. Its Class 3A thread fit and coarse UNC threading enhance grip and vibration resistance, which is vital for maintaining integrity in dynamic loads. The socket head with hex drive and knurling allows for secure tool engagement, streamlining maintenance and assembly processes in confined spaces.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for high precision and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets industry requirements for safety and environmental responsibility.