S-8077A313 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precision alignment and smooth rotation ensured by the standard shoulder fit and Class 3A thread fit for reduced wear and consistent operation.
• Enhanced grip and anti-rotation provided by the knurled socket head, facilitating secure installation and maintenance.
• Optimized for quick assembly with coarse UNC threads and a 1/4" hex drive, saving time in high-volume production settings.
• Durable, wear-resistant surface from the black oxide finish, which also adds a layer of corrosion protection and a professional appearance.
• Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met for global supply chains.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common challenges in precision machinery and assembly lines, such as component misalignment and fastener failure. The black oxide finish enhances corrosion resistance, crucial for equipment exposed to moisture or chemicals. Its UNC coarse threads and Class 3A thread fit provide reliable engagement in high-vibration environments, reducing the risk of loosening. The knurled socket head ensures a firm grip during installation, minimizing slippage and tool damage. Ideal for applications in robotics, automotive, and conveyor systems, this screw delivers consistent performance, lowers maintenance costs, and supports efficient industrial operations with its robust design and compliance with key standards.

Specification Summary & Compliance

This shoulder screw features precise dimensions including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring accurate fits. It adheres to UNC thread standards with a Class 3A thread fit for tight tolerances and reliable performance. Manufactured in compliance with ASME B18.3 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and safety-focused industrial applications.