S-92311A330 1/4"-28 x 1 1/8" 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 long-term reliability.
• Exceptional holding power and vibration resistance due to the Class 3A fine thread fit, minimizing the risk of loosening under load.
• Secure, non-slip installation enabled by the 1/8" hex drive in a headless design, allowing for flush mounting and a clean finish.
• Enhanced grip and minimal surface damage from the cup point tip, providing excellent bite into the mating material.
• Consistent mechanical strength with a Rockwell B80 hardness, ensuring durability and resistance to wear.
• Broad industry compatibility by meeting ASME B18.3 specifications, ensuring reliable performance in various assemblies.
• Safe for regulated applications with compliance to RoHS 3 and REACH, making it suitable for sensitive and international markets.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address critical challenges in precision assemblies where vibration resistance and secure fastening are paramount. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it ideal for use in machinery, automotive components, and electronic enclosures exposed to moisture or chemicals. Its fine thread spacing and Class 3A thread fit provide a tighter tolerance, reducing the risk of backlash and ensuring consistent clamping force in dynamic applications. The headless design with a hex drive allows for compact installations in confined spaces, while the cup tip concentrates pressure for a firm grip without excessive marring. By integrating these features, this set screw delivers reliable performance in industrial set screws applications, enhancing product longevity and reducing maintenance needs.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for high accuracy and a UNF fine thread with a size of 1/4"-28. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. Additionally, it meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its safety for use in various industrial and consumer products without hazardous substances.