S-90272A404 1/4"-20 x 5 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, ensuring long-term reliability in harsh environments
- Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Optimized drive engagement with Phillips No. 3 drive for efficient installation and reduced cam-out risk
- Reliable thread performance with UNC coarse threads and Class 2A fit for secure fastening in various materials
- Full-length threading provides maximum grip along the entire 5½" length for superior load distribution
- Standard-compliant design meeting ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these zinc-plated steel rounded head Phillips screws solve critical fastening challenges in construction, machinery assembly, and structural frameworks. The 1/4"-20 UNC coarse thread configuration ensures rapid installation and superior pull-out resistance in wood, metal, and composite materials. The pan head design with rounded profile provides a finished appearance while distributing clamp load effectively. With full threading along the 5½" length, these screws maintain consistent engagement depth, preventing joint failure in vibration-prone environments. The zinc plating delivers essential corrosion protection, extending service life in outdoor or high-moisture conditions where fastener integrity is paramount.
Specification Summary & Compliance
This 1/4"-20 x 5½" screw features Class 2A thread fit per UNC standards, ensuring proper clearance and assembly compatibility. Manufacturing adheres to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements, confirming environmental safety and regulatory acceptance for industrial use across global markets.
