S-90278A406 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise alignment and smooth rotation thanks to the exact 20mm shoulder with tight diameter tolerance
• High mechanical strength with Rockwell B55 hardness and 70,000 psi tensile strength for demanding applications
• Reliable thread engagement ensured by Class 6g thread fit and coarse 0.8mm pitch for quick assembly
• Secure, flush installation with smooth hex socket head and 3mm drive, minimizing protrusion
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use
• Versatile metric design with M5 thread and 6mm thread length for standardized equipment integration

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in mechanical assemblies. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in humid or chemically aggressive settings like food processing, marine equipment, and outdoor machinery. The 20mm shoulder length with precise diameter control ensures accurate component positioning, reducing wear and misalignment in rotating parts such as gears, pulleys, and bearings. The hex socket head allows for high-torque installation in confined spaces, while the Class 6g thread fit and coarse pitch enable rapid, secure fastening without cross-threading. Ideal for use in automation systems, precision instruments, and industrial machinery, this screw enhances assembly reliability and longevity.

Specification Summary & Compliance

This M5 shoulder screw features a metric thread with 0.8mm coarse pitch and Class 6g thread fit per ISO standards, ensuring dimensional accuracy. The shoulder diameter is 6mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 20mm with a tolerance of 0 to 0.05 mm for precise fit. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility.