S-8077A198 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh or outdoor industrial environments.
• Enhanced durability and wear resistance from the Black Oxide finish, providing a protective layer against abrasion.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise thread engagement and assembly with Class 3A fit and UNC coarse threading, ensuring secure fastening and reducing cross-threading risks.
• Secure grip and easy installation thanks to the knurled socket head and hex drive, allowing for efficient tool engagement in tight spaces.
• Accurate shoulder positioning with controlled diameter and length tolerances, providing consistent alignment for pivoting or rotating components.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw with a Black Oxide finish is engineered to address critical challenges in mechanical assemblies requiring precise alignment and corrosion resistance. The UNC coarse thread and Class 3A fit provide reliable fastening in high-vibration applications, such as machinery linkages, automotive components, and conveyor systems, minimizing loosening over time. The knurled socket head enhances grip for secure installation, even in confined spaces, while the hardened Rockwell B79 material ensures long-term durability against wear. Ideal for use in marine, chemical processing, and food-grade equipment, this screw offers a robust solution for maintaining structural integrity and operational efficiency in demanding environments.

Specification Summary & Compliance

This shoulder screw features a 5-40 UNC coarse thread with a Class 3A fit for precise dimensional accuracy. Key tolerances include a shoulder diameter of -0.004" to -0.002" and a shoulder length of -0.005" to 0.005", ensuring consistent performance. Manufactured from 316 stainless steel with a Black Oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in industrial applications.