S-99934A760 1/4"-20 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 harsh industrial environments
• Exceptional holding power achieved through Class 3A thread fit precision and Rockwell B80 hardness
• Enhanced grip and reduced component slippage with silver tip material providing superior friction
• Easy installation in confined spaces thanks to the headless design and 1/8" hex drive
• Reliable performance in high-vibration applications with right-hand coarse UNC threads
• Long-term durability maintained through compliance with RoHS 3 and REACH environmental regulations
• Broad industrial compatibility ensured by meeting ASME B18.3 manufacturing specifications

Professional Applications & Engineering Value

This 1/4"-20 UNC Class 3A hex headless set screw delivers critical engineering solutions for securing rotating components like gears, pulleys, and collars onto shafts. The 18-8 Stainless Steel material provides excellent corrosion resistance, eliminating rust-related failures in moist or chemical-exposed environments. Its silver tip increases friction contact, preventing loosening under vibration—a common industrial challenge. The coarse thread design ensures quick assembly and disassembly while maintaining Class 3A thread fit precision for tight tolerances. These features make it indispensable in machinery manufacturing, automotive systems, and precision equipment where reliable, long-term fastening is non-negotiable.

Specification Summary & Compliance

This set screw maintains Class 3A thread fit per UNC standards with a 1/4"-20 thread size and coarse spacing. Manufacturing adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries and environmentally conscious applications.