S-94355A140 4-40 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life
• Exceptional holding power ensured by Class 3A thread fit, providing precise, tight, and reliable fastening in demanding applications
• High-strength durability with Rockwell B80 hardness, resisting deformation and maintaining integrity under heavy loads
• Secure and efficient installation via the 0.050" hex drive, allowing for high torque application and preventing tool slippage
• Optimal surface contact with the flat tip design, minimizing component damage and ensuring stable, flush positioning
• Wide compatibility with UNC coarse threads (4-40), facilitating quick assembly and disassembly in various industrial setups
• Regulatory peace of mind through compliance with ASME B18.3, RoHS 3, and REACH, meeting strict quality and environmental standards

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address critical fastening challenges in industrial and mechanical assemblies. The 18-8 Stainless Steel material offers excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as machinery, automotive components, and electronic enclosures. The Class 3A thread fit and coarse thread spacing ensure a secure, vibration-resistant connection, reducing the risk of loosening in high-stress scenarios. With its hex headless design and flat tip, it provides a flush finish that prevents interference in compact spaces, while the right-hand thread direction allows for standard installation. Ideal for precision equipment and heavy-duty uses, this set screw delivers reliable performance, minimizing maintenance needs and enhancing operational efficiency.

Specification Summary & Compliance

This set screw features a 4-40 UNC thread size with Class 3A thread fit for high precision and tight tolerances. It adheres to ASME B18.3 manufacturing specifications, ensuring consistent quality and performance. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use.