S-90278A735 M2.5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• Precise alignment and reduced assembly stress due to the smooth, accurately machined 30mm shoulder with tight tolerances for consistent fit.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Secure and efficient installation with a 2mm hex socket drive, preventing stripping and enabling high torque application.
• Reliable thread engagement through Class 6g metric coarse threads (0.45mm pitch), ensuring vibration resistance and easy assembly.
• Environmental compliance meeting RoHS 3 and REACH standards, making it safe for regulated industries.
• Versatile right-hand thread design compatible with standard metric components for broad interoperability.

Professional Applications & Engineering Value

This M2.5 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to corrosion and wear, ideal for machinery, electronics, and automotive components exposed to moisture or chemicals. The 30mm shoulder length with precise diameter control acts as a pivot or spacer, reducing wear on moving parts and maintaining exact positioning without additional bushings. Combined with a Class 6g thread fit and coarse thread pitch, it ensures quick, secure fastening in high-vibration environments, minimizing loosening and assembly time. This socket head shoulder screw is a trusted solution for applications requiring reliable performance and minimal maintenance.

Specification Summary & Compliance

This shoulder screw adheres to metric thread standards with M2.5 size, 0.45mm pitch, and Class 6g thread fit for consistent compatibility. Shoulder dimensions include a 3.5mm diameter with -0.025 to 0 mm tolerance and 30mm length with 0 to 0.05 mm tolerance, ensuring precise shoulder fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances for safe industrial use.