S-90471A426 2-56 x 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat Head 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
- Enhanced corrosion resistance with zinc-plated steel construction for longer service life in demanding environments
- Superior holding power with 60,000 psi tensile strength ensuring reliable fastening under stress
- Precise thread engagement with Class 2A fit and UNC coarse threads for quick assembly and vibration resistance
- Streamlined installation with standard flat head profile and Phillips No. 1 drive for flush mounting and easy driving
- Consistent performance backed by Rockwell B70 hardness for durability against wear and deformation
- Full-thread design providing maximum grip length and uniform load distribution across the entire fastener
- Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations for global industrial use
Professional Applications & Engineering Value
These 2-56 UNC flat head Phillips screws deliver exceptional engineering value for industrial applications where space constraints and reliability are critical. The zinc-plated steel construction provides essential corrosion protection in manufacturing environments, while the 60,000 psi tensile strength ensures secure fastening in vibration-prone equipment. The standard flat head profile with 100° countersink angle allows for flush mounting in precision assemblies, eliminating protrusions that could interfere with moving components. The coarse UNC threads and Class 2A fit enable rapid installation in various materials while maintaining consistent clamping force. These fully threaded machine screws are particularly valuable in electronics enclosures, machinery panels, and automotive components where reliable, low-profile fastening solutions are essential for long-term performance.
Specification Summary & Compliance
This fastener maintains precise Class 2A thread fit tolerance per UNC standards with right-hand threading and coarse thread spacing for optimal performance. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations for environmental safety and restricted substance control, ensuring suitability for global industrial markets and sensitive applications.
