S-91247A723 1/2"-13 x 2 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies
• Enhanced corrosion resistance from zinc plating, extending service life in demanding environments
• Reliable torque transmission via external hex drive and 3/4" head width for secure fastening
• Optimized thread engagement with UNC coarse threading and Class 2A fit, reducing cross-threading risks
• Controlled partial threading (1 1/4" min thread length) for precise clamping force distribution
• Consistent mechanical properties ensured by Grade 5 certification and Rockwell C25 hardness
• Regulatory compliance meeting RoHS 3 and REACH standards for global supply chain integration

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 5 steel hex head screw addresses critical challenges in machinery assembly, structural framing, and equipment manufacturing. The zinc plated finish provides essential corrosion protection in humid or outdoor environments, while the 1/2"-13 UNC coarse thread ensures rapid installation and vibration resistance. With partial threading optimizing grip range, it prevents joint loosening under dynamic loads. The external hex drive design accommodates standard tools for maintenance accessibility, making it indispensable for ASME B18.2.1-compliant projects requiring verified mechanical performance and regulatory adherence.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 and SAE J429 Grade 5 specifications with Class 2A thread fit for consistent dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Thread configuration follows UNC coarse spacing standards with right-hand orientation and 0.5" diameter.