S-90298A208 6-32 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-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, durable connections.
• Precise alignment and positioning ensured by the accurately machined shoulder with tight diameter and length tolerances.
• Easy installation and removal with a standard hex drive (3/32") and smooth socket head, reducing assembly time.
• Secure thread engagement thanks to Class 3A thread fit and coarse 6-32 UNC thread, minimizing loosening under vibration.
• Broad compliance with ASME B18.3 standards, RoHS 3, and REACH, ensuring safety and regulatory adherence.
• Versatile right-hand coarse thread suitable for various mechanical fastening applications requiring quick assembly.

Professional Applications & Engineering Value

This precision shoulder screw is engineered from 18-8 Stainless Steel with a passivated finish to combat corrosion in demanding settings like machinery, automotive, and electronics. The 6-32 UNC coarse thread and Class 3A thread fit provide robust, vibration-resistant fastening, while the precisely toleranced shoulder (5/32" diameter, 1/4" length) enables accurate component alignment, reducing wear and misalignment issues. With a hex drive for efficient torque application, it streamlines maintenance and assembly in industrial applications, ensuring long-term reliability and compliance with key industry standards.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with 6-32 UNC coarse threads and precise shoulder dimensions (diameter: 5/32" with -0.001" to 0.001" tolerance; length: 1/4" with -0.005" to 0.005" tolerance). It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.