S-90279A580 5/16"-18 x 1/2" 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-plated steel construction for extended service life in demanding environments
- Excellent driving torque transmission through No. 3 Phillips drive, reducing cam-out and tool slippage during installation
- Reliable coarse thread engagement with UNC threading for faster assembly and reduced cross-threading risks
- High tensile strength performance rated at 60,000 psi for secure fastening in structural applications
- Precision thread fit with Class 2A tolerance ensuring consistent mating with standard nuts and components
- Optimized head design featuring rounded profile for reduced surface marring and improved aesthetic integration
- Full regulatory compliance meeting ASME B18.6.3 specifications and international environmental standards
Professional Applications & Engineering Value
These zinc-plated steel rounded head Phillips screws deliver exceptional value in industrial assembly where corrosion resistance and mechanical reliability are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation with minimal alignment issues, significantly reducing assembly time in high-volume production environments. The zinc plating provides sacrificial protection against oxidation, making these industrial screws ideal for manufacturing equipment, electrical enclosures, and structural frameworks exposed to moderate environmental conditions. With 60,000 psi tensile strength and Rockwell B69 hardness, they maintain clamping force under vibration and dynamic loads, preventing joint failure in critical applications.
Specification Summary & Compliance
This 5/16"-18 x 1/2" screw features UNC coarse threads with Class 2A tolerance for precise fit, manufactured to ASME B18.6.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. Mechanical properties include 60,000 psi tensile strength and Rockwell B69 hardness, ensuring consistent performance across industrial applications.
