S-91247A769 9/16"-12 x 3" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies.
- Superior corrosion resistance from zinc plating, extending service life in harsh environments.
- Reliable mechanical performance with Rockwell C25 hardness, ensuring durability and resistance to wear.
- Easy installation and removal using standard external hex drive tools, reducing assembly time.
- Secure thread engagement with Class 2A thread fit and coarse UNC threading, minimizing cross-threading risks.
- Optimized for partial-thread applications providing unthreaded shank for precise clamping force.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, ensuring interchangeability and reliability.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical challenges in heavy machinery, structural frameworks, and automotive assemblies where vibration resistance and high tensile loads are paramount. The coarse UNC threading and partial threading design ensure rapid installation and superior clamping in materials prone to stripping. The zinc plated finish provides a protective barrier against oxidation and chemical exposure, making it suitable for outdoor and industrial environments. With its external hex drive and precise Class 2A thread fit, it delivers consistent performance in bolted joints requiring repeated disassembly, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This fastener adheres to Class 2A thread tolerance for consistent fit, manufactured under ASME B18.2.1 and SAE J429 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets. The inch-based dimensions include a 3" length with 9/16"-12 UNC coarse threads, meeting industrial standards for reliability and interchangeability.
