S-90920A286 1/4"-20 x 1/2" 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 industrial environments
- Enhanced torque transmission through T27 Torx drive design, reducing cam-out and tool slippage during installation
- Reliable flush mounting with undercut flat head profile and 82° countersink angle for seamless surface integration
- High-load capacity with 60,000 psi tensile strength, suitable for demanding mechanical applications
- Quick installation with coarse UNC threading and Class 2A thread fit ensuring smooth engagement
- Full-thread engagement along the entire 1/2" length for maximum grip and distribution of clamping forces
- Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value in industrial applications where corrosion resistance and reliable fastening are critical. The Torx T27 drive system prevents stripping and provides superior torque transfer compared to conventional drives, while the undercut flat head design ensures proper seating in countersunk holes without protrusion. The 1/4"-20 UNC coarse thread configuration enables rapid assembly in various materials, from machinery components to structural frameworks. With 60,000 psi tensile strength, these screws maintain integrity under substantial loads, making them ideal for automotive assemblies, industrial equipment manufacturing, and heavy-duty machinery where vibration resistance and long-term performance are essential requirements.
Specification Summary & Compliance
This flat head screw features precise Class 2A thread fit tolerance with 1/4"-20 UNC coarse thread spacing and right-hand threading. Manufacturing specifications strictly adhere to ASME B18.6.3 standards for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international quality and safety requirements.
