S-90278A438 M2 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment enabled by the 10mm shoulder with tight length tolerance, reducing assembly time and improving product quality.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under load.
• Secure and flush installation using the 1.5mm hex socket drive, providing a clean finish and preventing tool slippage.
• Consistent and reliable threading with Class 6g fit and M2x0.4mm coarse pitch, facilitating faster assembly and reducing cross-threading risks.
• Environmental regulation compliance meeting RoHS 3 and REACH standards, ensuring global market suitability and material safety.
• Dimensional stability from precise shoulder diameter and length tolerances, guaranteeing repeatable performance in automated or precision assemblies.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to solve critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for electronics, medical devices, and automotive components exposed to moisture or chemicals. The 10mm shoulder length with precise tolerance acts as a built-in spacer, ensuring accurate positioning of moving parts like gears and pulleys without additional components. The hex socket head allows for compact installation in confined spaces, while the Class 6g thread fit ensures secure fastening in metric coarse thread applications. This combination reduces assembly errors, minimizes maintenance, and enhances the longevity of high-precision machinery and equipment.

Specification Summary & Compliance

This precision shoulder screw features a Class 6g thread fit per metric standards, with a shoulder diameter of 3mm (tolerance: -0.025 to 0 mm) and shoulder length of 10mm (tolerance: 0 to 0.05 mm). It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55 and tensile strength of 70,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards.