S-90323A218 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Precise component alignment thanks to the 20mm shoulder with tight tolerances, minimizing assembly play and improving mechanical stability.
• High strength and durability with Rockwell B95 hardness and 80,000 psi tensile strength, suitable for demanding industrial applications.
• Secure and efficient installation using the 2mm hex socket drive and low-profile head, allowing for easy access in confined spaces.
• Reliable thread engagement with Class 6g metric coarse threads (M3x0.5), ensuring consistent fastening performance and vibration resistance.
• Environmental compliance assurance by meeting RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices.
• Versatile right-hand threading with coarse spacing, enabling quick assembly and disassembly in various mechanical systems.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common industrial challenges such as misalignment and wear in precision assemblies. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, making it ideal for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The 20mm shoulder length with precise tolerances acts as a reliable pivot or spacer, reducing stress on threaded sections and enhancing the lifespan of connected components. Its hex socket drive and low-profile head facilitate easy installation in tight spaces, while the Class 6g thread fit ensures secure fastening without loosening under vibration. By integrating these features, this screw delivers consistent performance in industrial shoulder screw applications, from robotic arms to conveyor systems, where accuracy and durability are critical.

Specification Summary & Compliance

This product adheres to metric system standards with an M3 thread size, 0.5mm pitch, and coarse spacing. Thread fit is Class 6g per ISO norms, while shoulder dimensions include a diameter of 4mm (tolerance: -0.025 to 0mm) and length of 20mm (tolerance: 0 to 0.05mm) for precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.