S-90280A842 1/4"-20 x 3/8" ASME B18.6.3 Steel Fillister Head Slotted Screws
Steel Fillister Head Slotted 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 zinc-plated steel construction for extended service life in demanding environments
- Enhanced torque transmission through high, narrow fillister head design providing better driver engagement
- Reliable fastening performance with 60,000 psi tensile strength and Rockwell B69 hardness for heavy-duty applications
- Quick installation and removal with standard slotted drive compatible with common industrial tools
- Consistent thread engagement through Class 2A thread fit and UNC coarse threading for secure connections
- Maximum holding power achieved through fully threaded design along the entire 3/8" length
- Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance
Professional Applications & Engineering Value
These zinc-plated steel fillister head screws with 1/4"-20 UNC coarse threading deliver exceptional value in industrial applications where vibration resistance and reliable fastening are critical. The high-dome fillister head profile provides increased bearing surface for improved load distribution, while the slotted drive style ensures compatibility with standard maintenance tools. Engineered with Rockwell B69 hardness and 60,000 psi tensile strength, these screws maintain integrity under stress in machinery assembly, electrical enclosures, and automotive components. The fully threaded design guarantees consistent clamping force throughout the fastener length, preventing loosening in high-vibration environments common in manufacturing and heavy equipment applications.
Specification Summary & Compliance
This 1/4"-20 x 3/8" fillister head slotted screw features Class 2A thread fit per UNC standards with coarse threading for optimal engagement. Manufactured to ASME B18.6.3 specifications ensuring dimensional precision and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance management. The zinc-plated steel construction provides corrosion protection while maintaining the mechanical properties required for industrial fastening applications.
