S-90265A331 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• High mechanical strength with 70,000 psi tensile and 45,000 psi shear strength, ensuring dependable performance under load.
• Precise component alignment enabled by the 10mm shoulder with tight diameter tolerance, reducing assembly wear.
• Secure, non-slip fastening from the knurled head and 6mm hex socket drive, allowing for high-torque installation.
• Reliable thread engagement with Class 5g6g fit and M8x1.25 coarse pitch, facilitating quick and stable assembly.
• Broad industry compliance meeting ISO 7379, RoHS 3, and REACH, ensuring safety and environmental standards are met.
• Consistent dimensional accuracy per ISO 7379, guaranteeing interchangeability and fit in precision applications.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and durability challenges in industrial assemblies. The 18-8 stainless steel material offers excellent corrosion resistance, making it suitable for machinery, automotive, and electronic equipment exposed to moisture or chemicals. The 10mm shoulder length with precise tolerances acts as a pivot or spacer, ensuring accurate positioning of moving parts like gears and pulleys, which reduces wear and maintenance. The hex socket head with knurling provides a secure grip for high-torque applications, while the coarse thread pitch enables faster installation and robust holding power. Fully compliant with ISO 7379 and environmental regulations, this screw delivers reliable performance in demanding engineering environments, minimizing downtime and enhancing product lifespan.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 standards, with thread dimensions of M8x1.25 and a Class 5g6g thread fit for consistent engagement. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring precise alignment. It is manufactured from 18-8 stainless steel with a hardness of Rockwell B83, tensile strength of 70,000 psi, and minimum shear strength of 45,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety requirements for industrial use.