S-91286A322 1/2"-13 x 1 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 capability with Grade 8 classification and 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc-flake coating that withstands harsh industrial environments
- Optimized torque transmission with external hex drive and 3/4" head width for secure installation
- Reliable thread engagement featuring Class 2A UNC coarse threads that resist loosening under vibration
- Full-length threading ensures maximum grip strength across the entire 1-3/4" length
- Consistent performance backed by Rockwell C33 hardness for maintained mechanical properties
- Regulatory compliance meeting ASME, SAE, RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc-flake coated steel construction provides exceptional corrosion resistance in demanding environments like manufacturing facilities, heavy equipment, and structural assemblies. The 1/2"-13 UNC coarse thread design ensures rapid installation and superior resistance to vibration-induced loosening, while the external hex drive allows for high-torque application without stripping. With fully threaded coverage along the 1-3/4" length, these fasteners distribute clamping force evenly, preventing joint failure in high-stress applications. Engineered to ASME B18.2.1 and SAE J429 specifications, they provide reliable, standardized performance for industrial maintenance, machinery assembly, and construction projects requiring heavy-duty fastening solutions.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit tolerances with 1/2"-13 UNC coarse thread specification. Manufacturing complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
