S-91257A738 1/2"-13 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 applications
- Superior corrosion resistance provided by zinc yellow-chromate plating in harsh environments
- Optimized thread engagement through 1/2"-13 UNC coarse thread design for faster assembly and reliable holding power
- Enhanced durability from Rockwell C33 hardness rating, resisting wear and deformation under stress
- Secure fastening performance ensured by Class 2A thread fit for consistent torque application
- Versatile partial threading allowing unthreaded shank sections for shear strength in structural connections
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for reliable quality
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plated steel construction protects against oxidation in industrial environments, while the 1/2"-13 UNC coarse thread design ensures rapid installation and superior vibration resistance in heavy machinery, structural steel connections, and equipment assembly. The partially threaded configuration provides an unthreaded bearing surface that enhances shear strength, making it ideal for pivot points and structural joints where bolt shank integrity is critical. These industrial hex bolts are engineered to maintain clamping force under extreme loads, preventing joint failure in construction, manufacturing, and transportation applications.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and 1/2"-13 UNC coarse thread specifications. This fastener meets ASME B18.2.1 and SAE J429 mechanical requirements for Grade 8 fasteners, ensuring consistent performance across applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe use in regulated industries.
