S-90323A212 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Precise component alignment enabled by the 4mm diameter shoulder with tight tolerances (±0.025mm), reducing assembly errors.
• High mechanical strength with 80,000 psi tensile strength and Rockwell B95 hardness for demanding applications.
• Secure, low-profile installation via the hex socket drive, ideal for confined spaces and providing a clean finish.
• Enhanced durability and chemical resistance from the passivated finish, extending service life.
• Reliable thread engagement with Class 6g metric coarse threads, ensuring consistent fastening performance.
• Compliance with global environmental standards including RoHS 3 and REACH, supporting sustainable manufacturing.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and stability challenges in industrial assemblies. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it suitable for applications in electronics, machinery, and automotive systems where exposure to moisture or chemicals is common. The 4mm shoulder diameter with precise tolerances ensures accurate positioning of components like gears, bearings, and pulleys, minimizing wear and vibration. Combined with the hex socket drive and low-profile head, it allows for easy installation in tight spaces while maintaining a sleek design. The M3x0.5mm coarse thread and Class 6g fit provide secure fastening, reducing the risk of loosening under dynamic loads. This screw is ideal for precision components requiring reliable, long-term performance in demanding environments.

Specification Summary & Compliance

This M3 shoulder screw features a shoulder diameter of 4mm with a tolerance of -0.025 to 0 mm and a shoulder length of 5mm with a tolerance of 0 to 0.05 mm, ensuring high dimensional accuracy. The metric thread follows a Class 6g fit for consistent engagement. It is manufactured from 18-8 stainless steel with a passivated finish to enhance corrosion resistance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its adherence to environmental and safety regulations for industrial use.