S-91273A391 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance under load.
• Precise component alignment enabled by the 18mm shoulder with controlled diameter tolerance, reducing wear and simplifying assembly.
• Secure and efficient installation with a 2.5mm hex socket drive and knurled head for enhanced grip and reduced tool slippage.
• Consistent thread engagement ensured by the Class 5g6g metric thread with M5x0.8 coarse pitch for quick assembly and vibration resistance.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards, ensuring safety and suitability for global markets.
• Durable material hardness rated at Rockwell B55, providing excellent wear resistance and deformation prevention.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. The 18-8 stainless steel material offers outstanding corrosion resistance, making it suitable for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The integrated shoulder with a precise diameter of 5 mm and length of 18 mm acts as a pivot or spacer, ensuring accurate positioning of parts like gears, bearings, or linkages. The hex socket drive with a knurled head allows for high-torque installation without cam-out, while the Class 5g6g thread with a coarse pitch facilitates rapid assembly and maintains hold in vibrating environments. This design minimizes maintenance needs and enhances the longevity of industrial equipment.

Specification Summary & Compliance

The screw features a metric thread size M5x0.8 with Class 5g6g tolerance for consistent fit. Shoulder dimensions include a diameter of 5 mm (tolerance: -0.04 to -0.01 mm) and length of 18 mm (tolerance: 0 to 0.25 mm). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for various industrial applications requiring high durability and safety standards.