S-90278A424 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise alignment and smooth rotation enabled by the 25mm shoulder with tight diameter tolerance for consistent assembly quality
• High-strength reliability with 70,000 psi tensile strength and Rockwell B55 hardness to withstand demanding mechanical loads
• Secure hex socket drive with 5mm hex key for high-torque installation without cam-out, ensuring tight fastening
• Optimized thread engagement with Class 6g fit and M8x1.25 coarse thread for quick assembly and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Versatile metric sizing with 12mm thread length and standard dimensions for broad compatibility with industrial equipment

Professional Applications & Engineering Value

This M8 shoulder screw delivers critical engineering value in precision assemblies where alignment and durability are paramount. The 18-8 stainless steel material resists oxidation and chemical exposure, ideal for food processing, automotive, and outdoor machinery. Its 25mm shoulder length with precise diameter control acts as a built-in spacer, eliminating bushing needs and reducing part count in rotating mechanisms like conveyor rollers or pivot joints. The hex socket drive allows flush mounting in confined spaces, while the Class 6g thread fit ensures consistent clamping force without cross-threading. These features collectively solve common industrial pain points—corrosion-induced failure, assembly misalignment, and maintenance frequency—making it a cost-effective solution for heavy-duty applications requiring reliable, long-term performance.

Specification Summary & Compliance

This shoulder screw maintains metric thread standards with M8x1.25 coarse spacing and Class 6g thread fit per ISO tolerance guidelines. The shoulder features a diameter of 10mm with -0.025 to 0mm tolerance and length of 25mm with 0 to 0.05mm tolerance for precise fitment. Manufacturing adheres to industry norms for right-hand thread fasteners, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.