S-91273A426 M8 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 and durability offering a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under load.
• Precise component alignment enabled by the 14mm shoulder with controlled diameter tolerance, reducing wear and simplifying assembly.
• Secure and efficient installation with a 4mm hex socket drive and knurled head for superior grip and torque application.
• Accurate and reliable threading with Class 5g6g fit and M8x1.25 coarse pitch, ensuring consistent engagement and vibration resistance.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and export.
• Optimized for high-shear applications with a minimum shear strength of 35,000 psi, providing structural integrity in dynamic assemblies.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common challenges in precision machinery, automation systems, and tooling fixtures. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, crucial for maintaining performance in humid or corrosive settings. The integrated 14mm shoulder acts as a precise pivot, bearing surface, or locator, eliminating the need for additional spacers and reducing assembly time and component count. With its hex socket drive and knurled head, it ensures secure handling and high torque transmission without slippage, which is vital in confined spaces or high-vibration environments. The Class 5g6g thread fit and coarse pitch facilitate quick assembly and enhance resistance to loosening, making it a reliable choice for industrial fastening applications where accuracy and durability are paramount.

Specification Summary & Compliance

This shoulder screw features an M8x1.25 metric coarse thread with a Class 5g6g thread fit, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is -0.04 to -0.01 mm, and the shoulder length tolerance is 0 to 0.25 mm, providing precise control for engineering applications. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its suitability for use in environmentally conscious and regulated markets.