S-92620A250 9/16"-18 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, ideal for high-stress industrial assemblies
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
- Reliable thread engagement with Class 2A fit and UNF fine threads, ensuring vibration resistance and secure fastening
- Optimized for heavy torque applications featuring an external hex drive and Grade 8 steel construction
- Reduced weight and material usage through partial threading while maintaining full strength in critical sections
- Consistent performance compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
- Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications
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 plating creates a protective barrier against oxidation and chemical exposure, making it suitable for outdoor equipment, automotive assemblies, and machinery operating in humid conditions. The 9/16"-18 UNF fine thread configuration provides superior resistance to vibrational loosening compared to coarse threads, while the partial threading design concentrates strength where needed most. These heavy-duty fasteners are engineered to maintain clamp force under extreme loads, preventing joint failure in structural applications and reducing maintenance frequency in industrial settings.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNF thread form ensuring consistent engagement. The fastener complies with ASME B18.2.1 dimensional standards and SAE J429 material specifications for Grade 8 requirements. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, confirming restriction of hazardous substances. The Rockwell C33 hardness and 150,000 psi tensile strength validate the mechanical properties required for critical applications.
