S-90298A212 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibrations.
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
• Accurate 3/16" shoulder length with tight tolerances provides consistent alignment and spacing in assemblies.
• Hex socket drive design allows for easy installation and removal with standard tools, reducing assembly time.
• Compliance with ASME B18.3 standards ensures interchangeability and reliability in professional applications.
• RoHS and REACH compliance makes it safe for use in regulated industries without environmental concerns.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 8-32 UNC coarse thread and Class 3A fit provide excellent grip and resistance to vibration, making it ideal for machinery, automotive, and electronics where precise shoulder fit is critical. The passivated finish enhances durability in moist or chemical-exposed environments, while the socket head design facilitates quick maintenance. Its high tensile strength and Rockwell B55 hardness ensure long-term performance in heavy-duty fastening applications, reducing downtime and replacement costs.

Specification Summary & Compliance

This shoulder screw features a 3/16" shoulder length with tolerances of -0.005" to 0.005" and a shoulder diameter tolerance of -0.001" to 0.001" for precise fit. It adheres to ASME B18.3 specifications, with Class 3A thread fit for accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.