S-90920A290 5/16"-18 x 1 1/4" 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 demanding environments
- Enhanced torque transmission and reduced cam-out with T40 Torx drive for reliable installation and removal
- High tensile strength of 60,000 PSI ensures dependable performance under heavy loads and vibrations
- Optimal flush mounting with standard 82° countersink angle and flat head design for clean, secure finishes
- Wide compatibility and easy installation with UNC coarse threads and Class 2A thread fit for standard applications
- Maximum holding power through fully threaded design along the entire 1-1/4" length
- Compliance with major industrial standards including ASME B18.6.3, RoHS 3, and REACH for quality assurance
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value in industrial applications where reliability and precision are paramount. The combination of UNC coarse threads and Class 2A thread fit ensures quick assembly and secure fastening in metal fabrication, machinery, and construction projects. The T40 Torx drive system prevents tool slippage during high-torque applications, reducing installation time and potential damage to fastener heads. With their 82° countersink angle and flat head profile, these screws provide flush mounting in predrilled surfaces, eliminating protrusions that could interfere with moving parts or create safety hazards. The zinc plating offers reliable protection against corrosion, making these screws ideal for both indoor and outdoor industrial environments where moisture or chemical exposure may be present.
Specification Summary & Compliance
This 5/16"-18 flat head screw features precise Class 2A thread fit tolerances and UNC coarse thread spacing for consistent performance. Manufactured to meet ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial applications.
