S-91263A226 1/2"-20 x 2" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive 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
- Exceptional load-bearing capability with 120,000 psi tensile strength for demanding industrial applications
- Superior corrosion resistance provided by zinc-plated alloy steel construction in harsh environments
- Precise thread engagement with Class 3A fit ensuring reliable fastening in critical assemblies
- Optimal flush mounting through standard 82° countersink angle for seamless surface integration
- Enhanced installation efficiency with 5/16" hex drive for secure tool engagement and torque transfer
- Maximum thread coverage through fully threaded design for consistent holding power along entire length
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental directives
Professional Applications & Engineering Value
Engineered for high-stress industrial applications, these zinc-plated alloy steel flat head screws deliver exceptional performance in machinery assembly, structural frameworks, and heavy equipment manufacturing. The Class 3A UNF fine threads provide superior vibration resistance and precise fit in critical components, while the 82° countersink angle ensures flush mounting in precision-machined surfaces. The combination of 120,000 psi tensile strength and Rockwell C32 hardness makes these fully threaded screws ideal for applications requiring repeated disassembly and reassembly without thread degradation. The 5/16" hex drive facilitates efficient installation in confined spaces, reducing assembly time while maintaining torque integrity.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit for precision engineering applications. Features UNF 1/2"-20 fine threads with right-hand orientation and 2" fully threaded length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. The zinc-plated alloy steel construction provides consistent performance within specified hardness and strength parameters.
