S-92311A597 5/16"-24 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically aggressive environments.
• Exceptional holding power provided by the cup point tip design, which bites into the shaft for a secure, non-slip grip.
• Precise and reliable thread engagement thanks to the Class 3A UNF fine thread fit, minimizing the risk of loosening under vibration.
• High-strength durability with a Rockwell B80 hardness, ensuring the screw maintains its form and function under significant torque.
• Streamlined installation in confined spaces due to the headless design and 5/32" hex drive for easy access with standard tools.
• Guaranteed quality and interchangeability as it is manufactured to meet the rigorous ASME B18.3 specification.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A set screw is engineered to solve critical challenges in precision assembly and motion control systems. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it a dependable choice for machinery operating in demanding conditions, from food processing to marine applications. The headless and hex drive design allows for a flush finish and secure installation in tight spaces where protruding fastener heads are not feasible. The cup point creates a deep indentation on the shaft, providing superior resistance to rotational forces and vibration, a common failure point in high-torque assemblies. This combination of a fine thread and high Rockwell B80 hardness ensures that the screw can be tightened to precise torque specifications without stripping, delivering long-term reliability and reducing maintenance downtime in industrial applications.

Specification Summary & Compliance

This set screw features a 5/16"-24 UNF thread with a precision Class 3A fit for tight tolerances and a fine thread spacing. It is manufactured in accordance with the ASME B18.3 standard, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances for safe use in various global markets.