S-92196A227 4-40 x 2 3/4" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• High tensile strength of 70,000 psi ensures dependable performance under significant mechanical stress and vibration.
• Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading during assembly.
• Coarse UNC thread allows for faster installation and easier alignment in a variety of industrial materials.
• Hex socket drive offers secure tool engagement, enabling high torque application and reducing screw head stripping.
• Partially threaded design provides an unthreaded shoulder for precise clamping and alignment in assembled components.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees consistent quality and adherence to international safety and environmental standards.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered from 18-8 Stainless Steel to deliver exceptional corrosion resistance and durability in demanding settings such as machinery, automotive assemblies, and outdoor equipment. The 4-40 UNC coarse thread and Class 3A thread fit ensure reliable fastening in metals and plastics, minimizing loosening under dynamic loads. Its partially threaded shank provides a secure clamping zone, preventing component misalignment. The hex socket drive accommodates high-torque tools, making it suitable for confined spaces where wrenches cannot be used. This combination of material strength, precise thread form, and standardized dimensions solves common industrial challenges like vibration-induced failure and assembly inefficiency.

Specification Summary & Compliance

This fastener adheres to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The UNC coarse thread with Class 3A fit provides tight tolerances for secure fastening. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. Manufactured to meet a tensile strength of 70,000 psi and Rockwell B70 hardness, it guarantees performance in rigorous industrial applications.