S-90910A534 1/4"-20 x 2" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in demanding environments
• Exceptional torque transmission through Torx Plus IP27 drive system, reducing cam-out and tool wear
• Precision thread engagement with Class 3A fit ensuring reliable fastening in critical applications
• High mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty performance
• Optimized drive efficiency with T27 drive size providing secure tool engagement and reduced installation time
• Full-thread design offering maximum grip length and uniform stress distribution along the entire fastener
• Regulatory compliance meeting international standards for quality assurance and environmental safety

Professional Applications & Engineering Value

This zinc-plated alloy steel rounded head screw delivers exceptional performance in industrial assembly applications where vibration resistance and corrosion protection are critical. The Torx Plus IP27 drive system addresses common installation challenges by providing superior torque transfer, eliminating cam-out issues that often plague traditional drive systems. With its 1/4-20 UNC coarse thread and Class 3A thread fit, this fastener ensures precise engagement in machinery, equipment manufacturing, and structural applications. The fully threaded design combined with 120,000 psi tensile strength makes it ideal for applications requiring uniform clamping force and high load-bearing capacity, while the rounded button head profile offers a low-profile finish that reduces snagging hazards in operational environments.

Specification Summary & Compliance

This fastener features precision 1/4-20 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufacturing complies with ASME B18.3 specifications where identified as ASTM F835, ensuring consistent quality and performance. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety, making it suitable for global industrial applications with stringent environmental requirements.