S-92311A552 1/4"-20 x 2 1/2" 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
- Exceptional holding power achieved through Class 3A thread fit precision and cup point tip design
- Optimized mechanical strength with Rockwell B80 hardness for reliable performance under load
- Secure installation and removal via hex headless design with 1/8" drive for confined space applications
- Enhanced grip and anti-loosening from the cup point tip that bites into mating surfaces
- Industry-standard compatibility with UNC coarse threads and right-hand direction for broad application use
- Full regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3 & REACH)
Professional Applications & Engineering Value
This 1/4-20 UNC set screw delivers critical engineering solutions for industrial applications requiring permanent component positioning. The 18-8 stainless steel composition provides excellent corrosion resistance, making it ideal for machinery exposed to moisture, chemicals, or outdoor elements. The hex headless design with cup point tip creates deep indentation in shafts and collars, preventing rotational slippage in high-torque environments. With Class 3A thread fit precision and coarse thread spacing, this fastener maintains consistent clamping force in vibrating equipment while enabling quick installation. The 2-1/2" length accommodates deep mounting requirements in automotive, manufacturing, and aerospace assemblies where reliability is paramount.
Specification Summary & Compliance
This set screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured from 18-8 stainless steel with Rockwell B80 hardness and right-hand thread direction. The product complies with ASME B18.3 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
