S-92311A563 1/4"-28 x 7/8" 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.
• Precise and secure fastening thanks to the Class 3A thread fit, ensuring minimal backlash and vibration resistance in critical assemblies.
• High-strength performance with a Rockwell B80 hardness, providing excellent durability and resistance to wear under load.
• Easy installation and removal using a standard 1/8" hex key, allowing for efficient maintenance in confined, headless applications.
• Enhanced grip and component protection from the cup tip design, which minimizes surface damage while maintaining a firm hold.
• Reliable fine thread engagement with the 1/4"-28 UNF right-hand thread, offering improved tension control in precision machinery.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and corrosion in demanding settings. Made from 18-8 stainless steel, it provides exceptional resistance to rust and chemicals, extending service life in automotive, aerospace, and machinery assemblies. The headless hex drive and fine thread design allow for flush mounting and precise torque application, reducing the risk of loosening under vibration. Ideal for securing gears, pulleys, and collars, this screw’s cup tip ensures minimal marring while maintaining strong clamping force, supporting reliable performance in high-stress applications.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for high precision and meets ASME B18.3 specifications. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.