S-90263A129 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
• Precise component alignment enabled by the 20mm shoulder with tight length tolerance (0 to 0.05mm) and smooth surface for accurate positioning
• High mechanical strength and durability with 70,000 psi tensile strength and Rockwell B79 hardness for reliable performance under load
• Secure and efficient installation using the standard 2mm hex socket drive, providing a clean appearance and reduced risk of stripping
• Consistent and reliable threading with Class 6g thread fit and coarse M3x0.5 metric thread, ensuring easy assembly and vibration resistance
• Compliance with environmental regulations, being RoHS 3 and REACH compliant for safe use in regulated industries
• Versatile industrial application due to right-hand thread and precise shoulder diameter (4mm), suitable for pivots, spacers, and guides

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 316 stainless steel material, combined with a passivated finish, provides exceptional resistance to chemicals and moisture, making it ideal for applications in marine, chemical processing, and food equipment. The hex socket head allows for compact and secure fastening in tight spaces, while the precise shoulder with minimal tolerance ensures accurate alignment in assemblies like rotating shafts and bearing supports. Its Class 6g thread fit and coarse thread spacing facilitate quick installation and reduce the risk of cross-threading, enhancing productivity in automated or manual assembly lines. This screw delivers reliable performance in demanding environments, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw features a Class 6g thread fit with M3x0.5 metric coarse threads, ensuring dimensional accuracy per standard metric specifications. The shoulder diameter is 4mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 20mm with a tolerance of 0 to 0.05 mm for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications without hazardous substances.