S-90920A202 8-32 x 1 1/4" ASME B18.6.3 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Enhanced torque transmission through T15 Torx drive design, reducing cam-out and tool slippage during installation
• High-load capacity with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under stress
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening in various materials
• Flush mounting capability featuring 82° countersink angle and standard flat head profile for smooth surface finishes
• Full-length threading providing maximum grip along the entire 1-1/4" length for superior holding power
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 8-32 UNC flat head screws deliver exceptional engineering value through their optimized material and design characteristics. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, machinery, and outdoor applications where environmental exposure is a concern. The T15 Torx drive system addresses common installation challenges by preventing driver slippage, reducing fastener damage, and enabling higher torque application compared to traditional drive types. The Class 3A thread fit ensures precise engagement in both metals and plastics, while the 82° countersink angle allows for flush mounting in precision assemblies. These fully threaded screws with coarse UNC threading offer superior pull-out resistance in sheet metal, plastic components, and wood substrates, making them ideal for manufacturing, automotive, and electrical enclosure applications where vibration resistance and reliable fastening are critical.

Specification Summary & Compliance

These flat head screws maintain Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy and reliable performance. Manufacturing complies with ASME B18.6.3 specifications for dimensional consistency and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. The mechanical properties meet specified requirements including 60,000 psi tensile strength and Rockwell B70 hardness, providing assurance of consistent performance across production batches.