S-92311A273 4-48 x 1/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional holding power and vibration resistance due to the fine UNF thread and Class 3A fit for secure, precise fastening
• High-strength durability with a Rockwell B80 hardness, providing reliable performance under mechanical stress
• Easy installation in confined spaces with a headless design and compact 1/16" length
• Secure, non-slip driving enabled by the internal 0.050" hex drive for efficient torque application
• Positive component locking with a cup tip that bites into surfaces to prevent loosening
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

Engineered for precision and reliability, these 4-48 UNF Class 3A set screws are the ideal solution for securing components in tight spaces where vibration and corrosion are concerns. The 18-8 Stainless Steel material offers excellent resistance to rust and oxidation, making them suitable for applications in electronics, machinery, and automotive assemblies exposed to moisture or chemicals. The fine thread spacing and Class 3A thread fit ensure a tight, accurate engagement that minimizes backlash and maintains alignment under dynamic loads. Combined with the headless design and hex drive, these screws facilitate easy installation with standard tools, reducing assembly time while providing a flush finish. This makes them invaluable for industrial set screws used in precision instruments, securing shafts, and adjusting mechanisms where space is limited and performance is critical.

Specification Summary & Compliance

This set screw features a 4-48 UNF thread with a Class 3A fit for high precision and tight tolerances, ensuring reliable thread engagement. It adheres to the ASME B18.3 specification for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for industrial use.