S-90278A221 M6 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment enabled by the 8mm shoulder diameter with tight tolerance for reduced assembly play
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
• Secure and efficient installation with a 4mm hex socket drive, minimizing tool slippage and damage
• Consistent thread engagement ensured by Class 6g thread fit and 1mm coarse pitch for quick assembly
• Durable, smooth head finish that resists galling and provides a clean, professional appearance
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This M6 shoulder screw is engineered to address common challenges in precision assembly, such as misalignment and component wear. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The 8mm shoulder diameter with precise fit tolerance ensures accurate positioning of parts like gears, pulleys, or linkages, reducing vibration and extending equipment life. Combined with a Class 6g metric thread and coarse 1mm pitch, it allows for rapid, secure fastening in high-volume production lines. The socket head design with a 4mm hex drive facilitates easy installation in confined spaces, enhancing workflow efficiency while maintaining structural integrity under loads up to 70,000 psi tensile strength.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M6x1mm coarse thread and Class 6g thread fit for consistent performance. The shoulder features an 8mm diameter with a tolerance of -0.025 to 0 mm and a 14mm length with 0 to 0.05 mm tolerance, ensuring precise assembly. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for use in regulated industrial and electronic applications without hazardous substances.