S-97345A302 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi minimum shear) ensures reliable, long-lasting fastening under heavy loads.
• Precision Class 3A thread fit provides tight tolerances and secure engagement, reducing the risk of loosening in high-vibration applications.
• Easy installation and removal with a 3/32" hex socket drive and knurled head for improved grip and torque application.
• Accurate shoulder positioning with controlled diameter and length tolerances for consistent alignment in assemblies.
• Durable performance backed by Rockwell B79 hardness, offering excellent wear resistance and mechanical stability.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe, environmentally responsible use in regulated industries.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and assembly fixtures. The 5-40 UNC coarse thread and Class 3A fit enable rapid, secure fastening while minimizing cross-threading risks in high-cycle operations. The knurled socket head enhances tool grip, allowing for efficient torque transmission in confined spaces. With excellent corrosion resistance from 316 stainless steel, it performs reliably in moist or chemically aggressive settings, such as marine equipment, food processing lines, and medical devices. The precisely machined shoulder provides stable bearing surfaces for rotating components, reducing wear and maintaining alignment in pivots, linkages, and guide mechanisms. This combination of high-strength performance and regulatory compliance makes it a trusted choice for OEMs and maintenance teams seeking durable, precision-grade shoulder screws.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensional details include a thread diameter of 0.125", thread length of 3/16", shoulder diameter of 5/32" (tolerance: -0.004" to -0.002"), and shoulder length of 1/8" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring it is free of restricted substances and suitable for use in regulated industrial applications.