S-98621A112 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion and wear resistance thanks to 18-8 Stainless Steel construction and a durable TiCN coating, extending service life in demanding environments.
• Exceptional mechanical strength with a Rockwell B55 hardness and 70,000 psi tensile strength for reliable performance under high-stress conditions.
• Precise location and pivot function enabled by the accurately machined 4mm shoulder diameter with a tight -0.025 to 0 mm tolerance.
• Secure and stable assembly ensured by the 5mm shoulder length, providing a consistent bearing surface for components.
• Reliable and standardized fastening with a Class 6g thread fit and M3x0.5 coarse thread for easy installation and vibration resistance.
• Easy installation in confined spaces using a standard 2mm hex drive and compact socket head design.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring suitability for global markets and sensitive applications.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to solve critical alignment and wear challenges in precision assemblies. The 18-8 Stainless Steel core provides excellent corrosion resistance, while the TiCN coating drastically reduces friction and wear, making it ideal for high-cycle mechanisms. The precise shoulder acts as a dependable datum for locating parts like gears, pulleys, and linkages, eliminating misalignment and reducing assembly time. Its Class 6g thread fit and coarse thread spacing ensure a secure hold that resists loosening under vibration, which is vital in automation equipment, medical devices, and small machinery. This combination of material properties and dimensional accuracy delivers long-term reliability and reduces maintenance needs.

Specification Summary & Compliance

The screw features a Metric M3x0.5 thread with a Class 6g tolerance for a secure fit. The shoulder diameter is held to a precise tolerance of -0.025 to 0 mm, and the shoulder length to 0 to 0.05 mm. It is manufactured to common industrial standards for socket head shoulder screws and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.