S-91273A323 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing applications
• Precise assembly and alignment enabled by the 7mm shoulder with tight diameter and length tolerances
• Secure, non-slip fastening thanks to the knurled socket head and 2mm hex drive for firm tool engagement
• Consistent thread performance with Class 5g6g metric coarse threads ensuring easy installation and vibration resistance
• Long-term durability supported by Rockwell B55 hardness, maintaining integrity under repeated use
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common challenges in precision assemblies, such as misalignment and component wear. The 18-8 stainless steel material provides excellent corrosion resistance, reducing maintenance in moist or chemical-exposed settings like industrial machinery and automation systems. The Class 5g6g thread with a 0.5mm coarse pitch facilitates quick installation while resisting loosening from vibrations. Combined with the knurled socket head and hex drive, it ensures secure torque application, making it ideal for applications requiring exact positioning, such as in pivots, gears, and electronic enclosures. Its robust tensile and shear strength further enhances reliability in dynamic loads.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M3 thread size and 0.5mm coarse pitch, featuring Class 5g6g thread fit for precise tolerance. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring accurate fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial use.