S-90272A556 1/4"-20 x 3 1/2" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips 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
- High-torque driving capability with Phillips No. 3 drive design for secure installation and reduced cam-out
- Exceptional load-bearing capacity with 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Reliable thread engagement with UNC coarse threading and Class 2A fit ensuring consistent fastening performance
- Full-length threading providing maximum grip and holding power across the entire screw length
- Standard pan head profile offering excellent bearing surface and clearance for various assembly requirements
- Comprehensive compliance meeting ASME B18.6.3 specifications and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
This zinc-plated steel rounded head screw delivers exceptional engineering value for industrial assembly applications where corrosion resistance and high tensile strength are critical. The combination of UNC coarse threading with Class 2A fit ensures reliable performance in vibration-prone environments, preventing loosening while maintaining consistent clamping force. The Phillips No. 3 drive system provides superior torque transmission during installation, reducing operator fatigue in high-volume production settings. With full threading along its 3-1/2" length, this fastener offers maximum engagement in thick materials and structural components, making it ideal for machinery assembly, equipment manufacturing, and heavy-duty construction applications where long-term reliability is paramount.
Specification Summary & Compliance
This 1/4"-20 x 3-1/2" rounded head screw features precision UNC coarse threads with Class 2A dimensional tolerance for consistent fit and performance. Manufactured to exacting ASME B18.6.3 standards, the fastener ensures dimensional accuracy and mechanical properties required for industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) requirements for chemical safety, providing assurance for use in regulated industries and international markets.
