S-90251A191 8-32 x 5/16" 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
- Vibration-resistant performance with permanent nylon patch thread locker that maintains secure fastening even under dynamic loads
- Superior corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise thread engagement with Class 3A thread fit ensuring reliable installation and consistent clamping force
- High-temperature capability with thread locker effective from -50° to 250°F for demanding thermal applications
- Enhanced durability through Rockwell B80 hardness, providing excellent wear resistance and long service life
- Secure internal drive with hex headless design allowing flush mounting and preventing tampering
- Optimized grip with cup tip design that concentrates pressure for superior holding power on shafts and components
Professional Applications & Engineering Value
This 8-32 UNC hex headless set screw delivers critical engineering solutions for industrial applications where vibration resistance and permanent fastening are paramount. The nylon patch thread locker provides reliable anti-loosening protection without requiring additional adhesives, making it ideal for machinery, automotive assemblies, and precision equipment. Manufactured from 18-8 stainless steel, it offers excellent corrosion resistance while maintaining structural integrity in demanding environments. The Class 3A thread fit ensures precise installation with minimal play, while the cup tip design maximizes clamping force on rotating components. These features combine to solve common industrial challenges of component slippage, maintenance downtime, and fastener failure in high-vibration applications.
Specification Summary & Compliance
This set screw features 8-32 UNC coarse threads with Class 3A thread fit for precision manufacturing tolerance. The fastener meets ASME B18.3 dimensional standards and incorporates a permanent nylon patch thread locker rated for -50° to 250°F temperature range. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and material restrictions adherence for global industrial applications.
