S-90920A540 1/4"-20 x 3/4" ASME B18.6.3 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding environments
• Exceptional torque transmission with T27 Torx drive that minimizes cam-out and tool slippage
• High tensile strength rating of 60,000 psi ensures reliable performance under heavy loads
• Optimal flush mounting with standard 82° countersink angle for smooth surface finishing
• Precise thread engagement with Class 2A UNC coarse threads for faster assembly and vibration resistance
• Full threading design provides maximum grip length and uniform stress distribution
• Regulatory compliance meets ASME B18.6.3 specifications and environmental standards

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with T27 Torx drive deliver exceptional engineering value for industrial applications requiring reliable fastening solutions. The combination of 60,000 psi tensile strength and UNC coarse threading provides superior holding power in metal fabrication, machinery assembly, and structural components where vibration resistance is critical. The 82° countersink angle ensures flush mounting in precision applications, while the zinc plating offers essential corrosion protection for extended service life in challenging environments. These flat head Torx screws are engineered to prevent stripping and cam-out issues common in high-torque applications, making them ideal for maintenance, repair, and OEM manufacturing operations.

Specification Summary & Compliance

This 1/4"-20 x 3/4" flat head screw features Class 2A thread fit tolerance for precise engagement and UNC coarse thread specification with right-hand threading. Manufactured to ASME B18.6.3 standards for dimensional accuracy and performance reliability. 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.