S-90279A587 5/16"-18 x 1 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 protection with zinc-plated steel construction for extended service life in demanding environments
- Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness for heavy-duty applications
- Reliable thread engagement through UNC coarse spacing and Class 2A fit for secure fastening in various materials
- Optimized drive performance with No. 3 Phillips head design for efficient installation and reduced cam-out
- Maximum thread coverage with fully threaded design providing consistent clamping force along entire length
- Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed dimensional accuracy
- Environmental responsibility through RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver exceptional performance in industrial settings where corrosion resistance and structural integrity are paramount. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance under vibration and load stress, making them ideal for machinery assembly, structural frameworks, and heavy equipment manufacturing. The UNC coarse thread with Class 2A fit provides excellent engagement in both metal and composite materials, while the rounded head profile with Phillips drive offers streamlined installation without sharp edges. This engineering solution addresses common industrial challenges including fastener failure, corrosion-induced degradation, and installation efficiency in high-volume production environments.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing (5/16"-18). Fully compliant with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features right-hand threading, fully threaded design, and standard rounded head profile for consistent performance across industrial applications.
