S-91247A772 9/16"-12 x 3 3/4" 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 for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Optimized installation efficiency with external hex drive design providing secure tool engagement and torque transmission
- Enhanced thread reliability with Class 2A thread fit ensuring consistent assembly and vibration resistance
- Robust material performance featuring Grade 5 steel with Rockwell C25 hardness for lasting mechanical integrity
- Versatile coarse threading (UNC 9/16"-12) enabling quick assembly and disassembly in various materials
- Strategic partial threading allowing precise clamping force distribution across connected components
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The zinc plated steel construction provides essential corrosion protection in environments exposed to moisture and chemicals, while the external hex drive ensures maximum torque application without stripping. The coarse UNC threading delivers superior holding power in softer materials and faster installation times. With partial threading and 3 3/4" length, these fasteners optimize load distribution, preventing joint failure in high-vibration settings common in automotive, construction, and industrial machinery applications where reliable fastening solutions are paramount.
Specification Summary & Compliance
Manufactured to precise inch system measurements with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use across regulated industries. Features right-hand UNC coarse threads with minimum 1 3/8" thread length and Grade 5 strength classification for guaranteed reliability in industrial fastening applications.
