S-91273A387 M5 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced dimensional stability with precise shoulder diameter tolerance (-0.04 to -0.01 mm) for accurate alignment in assemblies.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear resistance for reliable load-bearing applications.
• Secure and easy installation featuring a knurled socket head with 2.5 mm hex drive for non-slip torque application.
• Consistent thread performance with Class 5g6g fit and coarse 0.8 mm pitch, ensuring smooth engagement and vibration resistance.
• Durable wear resistance due to Rockwell B55 hardness, extending service life in high-cycle operations.
• Compliance with global standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and electronic enclosures. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, while the 12 mm shoulder length with tight tolerances acts as a precise pivot or spacer, reducing wear on moving parts. The coarse metric thread (0.8 mm pitch) and Class 5g6g fit ensure quick assembly and reliable performance under dynamic loads, minimizing the risk of loosening. With a knurled socket head for secure tool grip, this screw is ideal for applications requiring repeated adjustments, such as in conveyor systems, robotic arms, and medical devices, where dimensional accuracy and long-term reliability are paramount.

Specification Summary & Compliance

This metric shoulder screw adheres to precise dimensional standards, including a shoulder diameter tolerance of -0.04 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm. The thread fit conforms to Class 5g6g for consistent engagement, and the product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.