S-8077A481 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, extending service life.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads.
• Precise Class 3A thread fit for secure, vibration-resistant assemblies with minimal backlash.
• Knurled socket head provides improved grip and easier installation with a 5/64" hex drive.
• Robust 35,000 psi shear strength for dependable performance in dynamic applications.
• Compliance with RoHS 3 and REACH standards, ensuring environmental and safety regulations are met.

Professional Applications & Engineering Value

This 4-40 UNC thread shoulder screw in 316 stainless steel with a black oxide finish is engineered to address critical industrial challenges, such as corrosion in chemical processing or marine settings. The coarse thread and Class 3A fit provide excellent holding power and resistance to loosening under vibration, making it ideal for machinery, automotive assemblies, and precision equipment. Its high tensile and shear strength ensures longevity in high-stress applications, while the knurled head enhances handling during installation. Suitable for industrial shoulder screw uses where reliability and compliance with standards like RoHS are paramount.

Specification Summary & Compliance

This shoulder screw features a 4-40 UNC coarse thread with Class 3A fit for precise dimensional accuracy, including shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It adheres to industry standards with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it meets environmental and safety requirements for global industrial use.