S-91306A375 1/4"-20 x 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
• Exceptional 120,000 PSI tensile strength ensures reliable performance under high-stress applications
• Rockwell C39 hardness provides excellent wear resistance and durability
• Class 3A thread fit delivers precise, secure fastening with minimal play
• 5/32" hex drive design allows for easy installation with standard tools
• Fully threaded UNC coarse threads enable rapid assembly and strong holding power
• Rounded button head profile offers a low-profile finish while distributing clamp load effectively

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated alloy steel rounded head screws address critical fastening challenges where vibration resistance and long-term reliability are paramount. The combination of UNC coarse threading and Class 3A fit ensures quick installation with superior thread engagement, reducing assembly time while maintaining joint integrity. The hex drive configuration prevents cam-out during high-torque applications, making them ideal for machinery, equipment manufacturing, and structural assemblies where 120,000 PSI tensile strength is required to withstand dynamic loads and prevent fastener failure.

Specification Summary & Compliance

These 1/4"-20 x 1/2" screws feature precise Class 3A thread fit per UNC standards with full threading along the entire 1/2" length. Manufacturing complies with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial use.