S-90278A309 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing replacement frequency
• Precise alignment and pivot function due to the 50mm smooth shoulder with tight diameter tolerance for reliable assembly
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
• Secure and flush installation using the hex socket drive, preventing cam-out and allowing for a low-profile head design
• Consistent and reliable threading with Class 6g fit and coarse M5x0.8 thread, ensuring easy assembly and vibration resistance
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Broad industrial compatibility with metric (M5) coarse threading, suitable for global machinery and equipment standards

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address critical alignment and wear challenges in precision assemblies. The 50mm shoulder length and smooth texture provide an exact pivot point or spacer, minimizing part movement and reducing wear in rotating mechanisms like gears, linkages, and bearings. Made from 18-8 Stainless Steel, it offers excellent corrosion resistance, which is vital for applications in food processing, medical devices, and outdoor machinery where moisture and chemicals are present. The hex socket head allows for secure tightening in confined spaces, while the Class 6g thread fit ensures reliable engagement without loosening under vibration. These features make it a dependable choice for engineers seeking longevity and precision in industrial fastening solutions.

Specification Summary & Compliance

This shoulder screw adheres to metric standards with an M5x0.8 coarse thread and Class 6g thread fit for consistent performance. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring precise fit in assemblies. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free of hazardous substances for safe industrial use.