S-91273A827 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the Black Oxide finish, providing a protective layer against abrasion.
• Superior load-bearing capacity with a tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance in heavy-duty applications.
• Precise alignment and smooth rotation thanks to the knurled head and standard shoulder fit, reducing assembly time and improving operational accuracy.
• Secure and consistent fastening with a Class 5g6g thread fit, ensuring tight tolerances and minimizing the risk of loosening under vibration.
• Easy installation and removal using a standard 4 mm hex drive, compatible with common tools for efficient maintenance.
• Compliance with environmental and safety standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical challenges in precision machinery and industrial assemblies. The 45mm shoulder length provides a stable bearing surface, enabling precise component alignment and reducing wear on moving parts, which is essential in applications like rotating shafts and linkages. Made from 18-8 Stainless Steel with a Black Oxide finish, it offers excellent resistance to corrosion and oxidation, extending service life in demanding environments such as automotive or manufacturing equipment. The coarse thread pitch of 1.25mm and Class 5g6g thread fit ensure quick, reliable fastening with minimal risk of cross-threading, while the socket head design allows for compact installation in tight spaces. This combination of materials and design enhances overall assembly integrity, making it a trusted choice for engineers seeking durability and performance in high-stress applications.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional tolerances, including a shoulder diameter tolerance of -0.04 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm, ensuring consistent fit and function. It features a metric thread with Class 5g6g fit for reliable engagement, and is manufactured to meet industry standards for hardness (Rockwell B55) and strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility in global supply chains.