S-97345A107 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments.
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable, heavy-duty fastening.
• Precise assembly and alignment ensured by the Class 3A thread fit and standard shoulder fit, reducing play and vibration.
• Easy installation and removal with a 5/64" hex socket drive and knurled head for improved grip and torque application.
• Durable and long-lasting performance backed by Rockwell B79 hardness, resisting wear and deformation under load.
• Wide compatibility with 4-40 UNC coarse right-hand threads, suitable for various industrial components and machinery.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and corrosive environments. The UNC coarse threads with Class 3A fit provide excellent engagement and vibration resistance, minimizing loosening in dynamic applications. The 1-inch shoulder length acts as a precise pivot or spacer, ensuring accurate alignment in assemblies like rotating shafts, bearings, and linkages. Made from 316 stainless steel, it offers exceptional resistance to chemicals, saltwater, and high humidity, making it ideal for food processing, medical equipment, and outdoor industrial uses. The knurled head and hex socket drive facilitate secure handling and high-torque installation, enhancing efficiency in maintenance and production lines.

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" (tolerance: -0.004" to -0.002"), and shoulder length of 1" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial fastening applications requiring high strength and durability.