S-97345A118 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.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise Class 3A thread fit ensures tight tolerances and secure fastening in critical assemblies.
• Secure and easy installation with a knurled socket head and 5/64" hex drive, preventing tool slippage.
• Durable and wear-resistant material with Rockwell B79 hardness for long-term reliability.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use.
• Versatile coarse UNC threads (4-40) facilitate quick assembly and disassembly in various industrial applications.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as corrosion, high stress, and precise alignment needs. Its Class 3A fit and UNC coarse threads provide exceptional dimensional accuracy, reducing the risk of loosening in vibrating machinery. The knurled socket head with a hex drive ensures secure torque application, minimizing installation errors. Ideal for applications in precision machinery, automotive assemblies, and marine equipment, this fastener delivers reliable performance where corrosion resistance and high tensile strength are critical, supporting efficient maintenance and reducing downtime.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for tight tolerances. Key dimensions include a thread size of 4-40, shoulder diameter of 1/8", and thread length of 5/32". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.