S-92505A540 1/4"-20 x 3/4" ASME B18.3, ASTM F912 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 black oxide coating for extended service life in demanding industrial environments
- Precise Class 3A thread fit ensures tighter tolerances and more reliable fastening than standard Class 2A alternatives
- High-strength alloy steel construction with Rockwell C45 hardness provides exceptional durability and resistance to wear
- Extended tip design delivers deeper penetration and superior grip for permanent component positioning
- Hex drive configuration allows for high-torque installation with standard tools while maintaining headless profile
- Coarse UNC threading enables quick assembly and reduced cross-threading risk in production environments
- Comprehensive compliance with ASME B18.3, RoHS 3, and REACH ensures material safety and manufacturing consistency
Professional Applications & Engineering Value
This black oxide alloy steel set screw addresses critical engineering challenges in industrial assembly applications where vibration resistance and permanent component positioning are paramount. The extended tip design with controlled diameter tolerances provides deeper material engagement, preventing slippage in high-stress applications such as gear hubs, pulleys, and coupling assemblies. The Class 3A thread fit combined with coarse UNC threading ensures rapid installation while maintaining precision alignment in manufacturing equipment, automotive components, and heavy machinery. The headless configuration with hex drive enables flush mounting in space-constrained applications while allowing sufficient torque application during installation.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features 1/4"-20 UNC coarse threads with right-hand direction and precise tip dimensions (0.156" diameter, 0.067" length) maintained within tight tolerances. The alloy steel construction achieves Rockwell C45 hardness for optimal strength characteristics. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global industrial markets.
