S-97345A101 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh 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.
• Precise Class 3A thread fit ensures tight tolerances and secure fastening in demanding assemblies.
• Enhanced grip and anti-slip handling from the knurled socket head, facilitating easier installation and removal.
• Robust Rockwell B79 hardness provides excellent wear resistance and durability for repeated use.
• Broad industrial compliance with RoHS 3 and REACH standards, ensuring safety and regulatory acceptance.
• Versatile UNC coarse thread design allows for quick assembly and disassembly in various mechanical applications.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in industrial settings, such as corrosion, high stress, and precision alignment. The UNC coarse thread and Class 3A fit provide a secure, vibration-resistant connection, minimizing loosening in machinery and equipment. Its knurled socket head enhances torque application, reducing tool slippage during installation. With a 70,000 psi tensile strength and excellent hardness, it supports heavy-duty applications like pivots, spacers, and rotating assemblies, ensuring long-term reliability and reduced maintenance costs in environments exposed to moisture, chemicals, or extreme loads.

Specification Summary & Compliance

The screw features a 4-40 UNC thread with Class 3A fit for precise dimensional accuracy, alongside a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and adherence to international standards for industrial components.