S-92311A113 4-40 x 3/4" 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, ideal for harsh industrial environments
- Maximum torque transmission through the 0.050" hex drive, preventing tool slippage during installation
- Exceptional holding power with the cup point tip design that creates deep indentations in mating surfaces
- Precise thread engagement with Class 3A fit, ensuring tighter tolerances and reliable fastening performance
- Enhanced durability with Rockwell B80 hardness, providing excellent resistance to wear and deformation
- Simplified installation using standard hex tools with the headless design, perfect for space-constrained applications
- Industry-standard compatibility with UNC coarse threads for quick assembly and disassembly operations
Professional Applications & Engineering Value
This 4-40 UNC set screw delivers exceptional engineering value in precision assembly applications where space limitations and vibration resistance are critical concerns. The 18-8 stainless steel composition provides excellent corrosion resistance for demanding environments, while the cup point tip creates permanent seating impressions that prevent rotational slippage under dynamic loads. The hex headless design allows for flush mounting in confined spaces, making it ideal for securing collars, gears, and pulleys on shafts in machinery, automotive, and aerospace applications. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of cross-threading and ensuring consistent clamping force in high-vibration industrial settings.
Specification Summary & Compliance
This precision fastener features 4-40 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications with a length of 3/4" and 0.050" hex drive. The set screw is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting the latest environmental and safety regulations for industrial components.
