S-92311A112 4-40 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Maximum holding power ensured by Class 3A thread fit for precise, vibration-resistant fastening
• Enhanced durability with Rockwell B80 hardness, providing reliable performance under mechanical stress
• Secure installation using the 0.050" hex drive, allowing high torque application without slippage
• Effective surface grip from the cup tip design, preventing component movement in assemblies
• Industry-standard compatibility with UNC coarse threads and right-hand direction for widespread use
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH for safe, quality-assured applications

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers exceptional engineering value in demanding industrial settings. Manufactured from 18-8 stainless steel, it resists corrosion and maintains integrity in moist or chemical-exposed environments. The Class 3A thread fit and coarse thread spacing provide superior clamping force, reducing loosening from vibrations in machinery, automotive components, and precision equipment. The headless design with hex drive enables flush mounting in confined spaces, while the cup tip bites into shafts or collars to prevent rotational slippage. Ideal for permanent fastening in industrial set screws applications, it ensures long-term reliability without frequent maintenance.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with precise Class 3A thread fit for tight tolerances and consistent performance. It features a 4-40 UNC thread size, 5/8" length, and right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial supply chains.