S-8077A491 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, providing long-lasting performance.
• High tensile strength of 70,000 psi and shear strength of 35,000 psi ensures reliable load-bearing in demanding applications.
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal play.
• Easy installation and removal with a 5/64" hex drive and knurled head for improved grip.
• RoHS 3 and REACH compliance meets stringent environmental and safety regulations for global use.
• Coarse UNC threading allows for quick assembly and disassembly, reducing labor time.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw with a Black Oxide finish is engineered to address common industrial challenges like corrosion, high stress, and precision alignment. The UNC coarse thread and Class 3A fit provide exceptional holding power in machinery, automotive, and electronics assemblies, minimizing loosening under vibration. Its knurled head and hex drive facilitate easy handling in tight spaces, while the shoulder design ensures accurate component positioning. Ideal for applications requiring corrosion resistance and reliable performance, it reduces maintenance needs and extends equipment lifespan in demanding environments.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A fit for precise tolerance, ensuring consistent performance. Dimensions include a thread size of 4-40, head diameter of 0.25", and shoulder length of 5/8" with tight tolerances. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material integrity for industrial use.