S-91286A485 3/4"-10 x 7" 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 for demanding structural applications
- Superior corrosion protection through zinc-flake coating, extending service life in harsh environments
- Reliable mechanical performance backed by Grade 8 certification and Rockwell C33 hardness rating
- Optimized thread engagement with UNC coarse threads ensuring faster assembly and reduced cross-threading risk
- Secure torque transmission via external hex drive design compatible with standard industrial tools
- Precision manufacturing maintaining Class 2A thread fit for consistent installation performance
- Regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical performance where structural integrity cannot be compromised. The zinc-flake coated surface provides superior corrosion resistance compared to conventional platings, making it ideal for outdoor equipment, construction machinery, and industrial assemblies exposed to moisture and chemicals. The 3/4"-10 UNC coarse thread configuration ensures rapid installation in thick materials while maintaining vibration resistance. With partial threading along its 7" length, it offers optimal clamping force distribution in multi-material assemblies. Engineered to 150,000 psi tensile strength and Rockwell C33 hardness, this steel fastener withstands extreme dynamic loads in heavy machinery, transportation equipment, and structural frameworks where failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications with Class 2A thread fit tolerance. Features right-hand UNC coarse threads (3/4"-10) with minimum 2" thread length on a 7" partially threaded shank. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global industrial deployment.
