S-91286A464 3/4"-10 x 3" 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 Grade 8 rating and 150,000 psi tensile strength for critical structural applications
- Superior corrosion resistance through zinc-flake coating that withstands harsh industrial environments
- Optimized torque transmission with external hex drive and 1 1/8" head width for secure installation
- Reliable thread engagement with 3/4"-10 UNC coarse threading and Class 2A fit for consistent performance
- Enhanced durability with Rockwell C33 hardness that maintains integrity under repeated stress
- Versatile partial threading allowing both threaded and unthreaded sections for specific clamping needs
- Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for global applications
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial settings where high tensile strength and corrosion resistance are paramount. The zinc-flake coating provides superior protection against environmental degradation, making these steel fasteners ideal for construction equipment, heavy machinery, and structural assemblies exposed to moisture and chemicals. The 3/4"-10 UNC coarse thread configuration ensures rapid installation and reliable performance in vibration-prone applications, while the external hex drive accommodates high torque requirements. With partial threading design, these industrial screws offer precise clamping control where unthreaded shank sections prevent thread damage in clearance holes, solving common assembly challenges in heavy-duty applications.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse threading and minimum thread length of 1 3/4". Manufactured to ASME B18.2.1 specifications meeting SAE J429 Grade 8 requirements, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The fastener maintains dimensional accuracy per inch system specifications with Rockwell C33 hardness and 150,000 psi tensile strength verification.
