S-90910A532 1/4"-20 x 1 1/4" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx Plus IP27 drive to prevent cam-out and reduce tool wear during high-torque applications
• Exceptional corrosion resistance through zinc-plated alloy steel construction for extended service life in harsh environments
• High-strength performance with 120,000 psi tensile strength and Rockwell C39 hardness to withstand demanding mechanical stresses
• Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in industrial assemblies
• Reduced head profile with rounded button design providing a low-profile finish while maintaining structural integrity
• Full threading capability allowing complete engagement along the entire 1-1/4" length for maximum holding power
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These zinc-plated alloy steel rounded head screws deliver exceptional engineering value in demanding industrial environments where vibration resistance and corrosion protection are critical. The Torx Plus IP27 drive system solves common assembly challenges by providing superior torque transmission without cam-out, significantly reducing fastener damage during high-torque applications. The Class 3A UNC coarse thread ensures rapid installation and reliable performance in machinery, automotive assemblies, and heavy equipment where vibration resistance is paramount. The combination of 120,000 psi tensile strength and Rockwell C39 hardness makes these fully threaded screws ideal for structural applications requiring consistent clamping force across the entire fastener length, while the rounded button head profile offers a clean, low-profile finish that minimizes snagging in moving machinery components.

Specification Summary & Compliance

This high-performance fastener features precision 1/4"-20 UNC coarse threads manufactured to Class 3A thread fit tolerances for superior engagement and consistent performance. The screw meets ASME B18.3 specifications (ASTM F835) for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring these fasteners meet current environmental standards for industrial use worldwide. The combination of zinc-plated alloy steel construction with Torx Plus IP27 drive and fully threaded design provides a comprehensive solution for professional applications requiring reliability, strength, and regulatory compliance.