S-92778A123 1/4"-20 x 3/8" ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
- Maximum holding power achieved through Class 3A thread fit for secure, vibration-resistant fastening
- Enhanced grip and surface protection from the oval tip design that minimizes component damage during installation
- High-strength performance with Rockwell B80 hardness ensuring durability under mechanical stress
- Easy installation in confined spaces using the 1/8" hex drive headless design
- Quick assembly efficiency with coarse UNC threads that reduce cross-threading risks
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 18-8 stainless steel set screws deliver exceptional engineering value in demanding applications where vibration resistance and corrosion protection are critical. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating loosening in machinery, automotive components, and precision equipment. The hex headless design allows flush mounting in pulleys, gears, and collars where protruding fastener heads would interfere with operation. Combined with the oval tip that distributes clamping force evenly, these UNC coarse thread screws prevent shaft damage while maintaining superior grip strength. Ideal for permanent installations in manufacturing equipment, robotics, and marine environments where Rockwell B80 hardness ensures long-term performance without deformation.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with 1/4"-20 UNC Class 3A threads providing precision fit and consistent performance. The coarse thread spacing and right-hand thread direction ensure compatibility with standard industrial components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and global market acceptance.
