S-90920A271 4-40 x 5/16" ASME B18.6.3 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx 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
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- Enhanced torque transmission through T8 Torx drive design, reducing cam-out and tool wear
- High-load bearing capability with 60,000 psi tensile strength for demanding industrial applications
- Secure flush mounting with 82° countersink angle and standard flat head profile
- Quick installation efficiency through coarse UNC threading and fully threaded design
- Precise thread engagement with Class 2A thread fit ensuring reliable fastening performance
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These 4-40 UNC flat head screws with T8 Torx drive deliver exceptional engineering value across industrial applications including machinery assembly, electronic enclosures, and automotive components. The zinc-plated steel construction provides essential corrosion protection while maintaining the 60,000 psi tensile strength required for structural integrity. The fully threaded design with coarse threading ensures maximum grip length and rapid installation in production environments. The 82° countersink angle creates seamless flush mounting that eliminates protrusions in precision assemblies. Engineered to solve common industrial challenges including vibration resistance, corrosion prevention, and high-volume assembly efficiency, these flat head Torx screws offer reliable performance where standard fasteners fall short.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit precision and UNC coarse thread specifications. These 5/16" length screws comply with ASME B18.6.3 manufacturing standards and maintain full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and standardized dimensions ensure compatibility with existing industrial equipment and tooling systems.
