S-91273A423 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance: Crafted from 18-8 Stainless Steel, this screw provides excellent durability in harsh or humid environments, reducing the risk of rust and component failure.
• High Tensile & Shear Strength: With a tensile strength of 70,000 PSI and a minimum shear strength of 35,000 PSI, it ensures reliable performance under significant mechanical loads and stress.
• Precision Thread Fit for Secure Assembly: The Class 5g6g thread fit offers consistent, accurate engagement, minimizing the risk of loosening and ensuring long-term joint integrity.
• Secure and Efficient Installation: The knurled, hex socket head design provides enhanced grip for tools, preventing cam-out and allowing for high-torque installation without slipping.
• Accurate Shoulder for Component Alignment: The 8mm shoulder diameter with tight tolerance ensures precise location and alignment of parts, crucial for machinery and assemblies requiring minimal play.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH compliance, making it a safe and responsible choice for global markets and environmentally conscious industries.
• Coarse Thread Pitch for Quick Assembly: The M8x1.25mm coarse thread allows for faster installation and reduced cross-threading risk, improving assembly line efficiency.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common industrial challenges such as misalignment, vibration-induced loosening, and corrosion. The 18-8 Stainless Steel construction offers robust resistance to oxidation and chemicals, ideal for applications in automotive, machinery, and outdoor equipment where exposure to elements is a concern. The knurled hex socket head ensures secure drive engagement, preventing tool slippage during high-torque applications and reducing installation errors. With a precision shoulder and Class 5g6g thread fit, it provides exact component positioning and stable fastening in assemblies like rotating shafts, pulleys, and gears, minimizing wear and maintenance needs. Its right-hand thread and coarse pitch facilitate quick, reliable fastening in production environments, enhancing overall operational efficiency and product longevity.

Specification Summary & Compliance

This shoulder screw features an M8x1.25mm metric coarse thread with a Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, providing precise fits for engineering applications. Manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industries without hazardous substances.