S-91286A463 3/4"-10 x 2 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 150,000 psi tensile strength, ideal for high-stress industrial applications
- Superior corrosion resistance from zinc-flake coating, extending service life in harsh environments
- Reliable thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
- High-grade material integrity from Grade 8 steel with Rockwell C33 hardness for consistent performance
- Optimized torque transmission through 1 1/8" external hex head design, preventing tool slippage
- Versatile partial threading allowing unthreaded shank sections for precise clamping in structural connections
- Regulatory compliance assurance meeting ASME B18.2.1 standards and environmental regulations
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical performance in construction equipment, machinery frames, and structural assemblies. The zinc-flake coated steel construction provides exceptional corrosion protection in outdoor or chemically aggressive environments, while the UNC coarse thread design ensures rapid installation and maintains clamping force under vibration. With 150,000 psi tensile strength and Rockwell C33 hardness, these partially threaded fasteners prevent joint failure in high-load scenarios. The external hex drive and substantial 1 1/8" head width enable high-torque application without stripping, making them ideal for maintenance-critical applications where reliability is paramount.
Specification Summary & Compliance
This 3/4"-10 hex head screw features precise Class 2A thread fit tolerances with UNC coarse threading and 2 3/4" overall length. Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 8 requirements, it ensures dimensional consistency and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting current substance restriction standards for industrial use.
