S-90323A442 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ensuring long-term reliability in harsh industrial environments.
• Precise alignment and reduced component wear thanks to the 25mm shoulder with tight length tolerance (±0.05mm) and smooth diameter fit.
• High-strength performance with Rockwell B95 hardness and 80,000 psi tensile strength for demanding mechanical applications.
• Secure, low-profile fastening via the hex socket drive and low-profile head, ideal for space-constrained assemblies.
• Reliable thread engagement with Class 6g metric coarse threads, ensuring consistent fit and vibration resistance.
• Easy installation and removal using a standard 2mm hex key, speeding up assembly and maintenance processes.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and part wear. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, extending service life in humid or chemical-exposed settings. The 25mm shoulder with precise tolerances acts as a reliable pivot or spacer, reducing friction and maintaining alignment in assemblies like rotating shafts, gears, and electronic enclosures. Its Class 6g thread fit and coarse thread pitch ensure quick, secure fastening, while the low-profile socket head allows for compact designs. Ideal for industrial fasteners in automation, automotive, and electronics, this screw delivers consistent performance where durability and accuracy are critical.

Specification Summary & Compliance

This shoulder screw features a metric M3x0.5mm thread with Class 6g tolerance for precise fit, a shoulder diameter of 4 mm with tolerance from -0.025 to 0 mm, and shoulder length of 25 mm with tolerance of 0 to 0.05 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for various industrial and mechanical applications.