S-90279A588 5/16"-18 x 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
- Exceptional 60,000 psi tensile strength provides reliable fastening performance under high-stress industrial conditions
- Optimized Phillips No. 3 drive design ensures secure tool engagement and reduces cam-out during installation
- Full UNC coarse threading delivers faster installation and superior holding power in various materials
- Class 2A thread fit guarantees consistent, precise mating with standard nuts and threaded components
- Comprehensive compliance with ASME B18.6.3 standards ensures dimensional accuracy and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These zinc-plated steel rounded head Phillips screws deliver critical engineering solutions for industrial assembly applications where corrosion resistance and high tensile strength are paramount. The fully threaded UNC coarse spacing design provides superior pull-out resistance in metal fabrication, machinery assembly, and structural frameworks. The Rockwell B69 hardness rating ensures excellent wear resistance during repeated installations, while the rounded head profile with Phillips No. 3 drive offers flush mounting capabilities and prevents surface damage. These industrial-grade fasteners solve common challenges of vibration loosening and environmental degradation, making them ideal for manufacturing equipment, automotive components, and construction applications requiring reliable, long-term fastening solutions.
Specification Summary & Compliance
This 5/16"-18 x 2" rounded head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent mating performance. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The combination of 60,000 psi tensile strength and Rockwell B69 hardness validates the screw's mechanical integrity for demanding applications.
