S-90263A278 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Precise component alignment through the 8mm shoulder with tight diameter and length tolerances for reduced assembly errors
• High-strength performance with 70,000 psi tensile strength and Rockwell B79 hardness for demanding applications
• Reliable thread engagement with Class 6g thread fit ensuring consistent fastening in metric assemblies
• Secure installation using the 5mm hex socket drive that prevents cam-out and provides clean fastener appearance
• Optimal material compatibility with coarse 1.25mm pitch threads that resist loosening under vibration
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This M8 shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment. The 316 stainless steel construction with passivated finish provides outstanding resistance to chemicals, saltwater, and industrial atmospheres, solving corrosion-related failure points in manufacturing environments. The precisely machined shoulder section acts as a pivot, bearing surface, or locator, eliminating the need for additional spacers or bushings in assemblies. The Class 6g thread fit ensures consistent engagement in metric components while the hex socket head allows for high-torque installation in confined spaces. These shoulder screws are engineered to maintain dimensional stability under load, making them ideal for precision alignment in robotics, automation systems, and mechanical assemblies where vibration resistance and positional accuracy are critical.

Specification Summary & Compliance

This precision shoulder screw features M8x1.25 metric coarse thread with Class 6g thread fit per ISO standards. The shoulder maintains tight tolerances with diameter of 10mm (-0.025 to 0mm) and length of 8mm (0 to +0.05mm) for precise fitment. Manufactured from 316 stainless steel with passivated finish, the fastener demonstrates Rockwell B79 hardness and 70,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.