S-97832A185 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• Precise component alignment ensured by the Class 3A thread fit and controlled shoulder diameter tolerance for reliable assembly.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength to withstand significant operational loads.
• Secure, non-slip fastening provided by the knurled socket head and 5/64" hex drive, allowing for high torque application.
• Optimized for high-volume assembly with coarse UNC threads and right-hand direction for quick and easy installation.
• Durable, long-lasting wear resistance due to Rockwell B55 hardness, reducing the need for frequent replacements.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and responsible manufacturing.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered for precision applications where alignment and strength are critical. The 4-40 UNC coarse thread and Class 3A fit provide a secure, vibration-resistant connection, ideal for machinery, automotive assemblies, and electronic enclosures. The 5/32" shoulder length acts as a precise spacer or pivot, eliminating the need for additional components and reducing assembly time. The knurled socket head with a 5/64" hex drive ensures a firm grip during installation, preventing tool slippage and damage in high-torque scenarios. Made from corrosion-resistant stainless steel, it offers reliable performance in demanding industrial environments, making it a top choice for precision shoulder screw applications requiring durability and exact tolerances.

Specification Summary & Compliance

This shoulder screw features a 4-40 UNC thread with a Class 3A fit for precise engagement, and a shoulder diameter tolerance of -0.004" to -0.002" for accurate alignment. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability. The construction meets high mechanical standards with a tensile strength of 70,000 psi and shear strength of 35,000 psi, supporting heavy-duty use.