S-90278A431 M2 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Precise component alignment enabled by the accurately machined shoulder with tight diameter and length tolerances.
• High mechanical strength offering a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable, long-term performance.
• Secure and efficient installation using a standard 1.5 mm hex key, preventing tool slippage and damage.
• Consistent and reliable thread engagement with a Class 6g metric coarse thread fit, ensuring stable assembly.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains.
• Smooth socket head profile for a clean, flush finish and reduced risk of snagging in automated applications.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, which is vital for equipment in medical devices, electronics, and automation systems exposed to moisture or chemicals. The precise shoulder fit acts as a pivot or locating dowel, eliminating misalignment and reducing wear on moving parts. The coarse thread pitch and Class 6g thread ensure quick assembly and robust holding power, while the socket head design allows for compact installations in tight spaces. Its combination of high tensile strength and environmental compliance makes it a dependable choice for OEMs and maintenance teams requiring repeatable accuracy and regulatory adherence.

Specification Summary & Compliance

This metric shoulder screw features an M2 x 0.4 mm coarse thread with a Class 6g thread fit per ISO standards, ensuring dimensional accuracy. The shoulder diameter is 3 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 2 mm with a tolerance of 0 to 0.05 mm for precise fit. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in products distributed in the EU and other regulated markets.