S-90279A548 1/4"-20 x 1 3/4" ASME B18.6.3 Steel Round Head Phillips Screws
Steel Round 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 plating for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable fastening under significant load and stress
- Excellent thread engagement with UNC coarse threads and Class 2A fit for quick assembly and vibration resistance
- Optimized drive performance featuring a Phillips No. 3 drive for secure torque application and reduced cam-out
- Enhanced durability from Rockwell B69 hardness, providing resistance to wear and deformation
- Full threading along the 1 3/4" length offers maximum grip and adjustability in various material thicknesses
- Broad industrial compliance meeting ASME B18.6.3, RoHS 3, and REACH for global quality and safety standards
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The UNC coarse thread design ensures rapid installation and superior holding power in wood, metal, and plastic applications, reducing labor time and maintenance costs. The Phillips drive provides a secure fit for power or manual tools, minimizing stripping and improving workflow in production lines. With a 1/4"-20 thread size and full threading, they deliver consistent clamping force in machinery, automotive assemblies, and construction projects, offering a reliable heavy-duty fastener solution that withstands harsh conditions while complying with environmental regulations.
Specification Summary & Compliance
This screw features precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. It adheres to ASME B18.6.3 for manufacturing consistency and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental safety requirements, making it suitable for global industrial use without hazardous substances.
