S-92620A550 1/4"-20 x 2" 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 reliable performance in high-stress applications
- Superior corrosion protection through zinc yellow-chromate plating, extending service life in harsh environments
- Optimized torque transmission with external hex drive design for secure installation and removal
- Enhanced thread engagement with UNC coarse threading and Class 2A fit for quick assembly and vibration resistance
- Maximum thread coverage through full threading along the 2" length for superior grip strength
- Consistent mechanical properties with Rockwell C33 hardness ensuring dimensional stability under load
- Industry-standard compatibility meeting ASME B18.2.1 and SAE J429 specifications for reliable interchangeability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial environments where fastener failure is not an option. The steel construction combined with zinc yellow-chromate plating provides exceptional corrosion resistance for outdoor equipment, machinery, and structural applications exposed to moisture and chemicals. The UNC coarse threading ensures rapid assembly in production environments while maintaining vibration resistance in dynamic systems. With fully threaded design and external hex drive, these fasteners offer maximum clamping force and easy installation in confined spaces. Engineered for heavy-duty applications in construction, manufacturing, and mechanical systems, these screws provide the reliability needed for critical connections where safety and durability are paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC 1/4"-20 coarse threading and compliant with ASME B18.2.1 and SAE J429 Grade 8 specifications. These fasteners meet stringent regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring environmental responsibility and workplace safety. The dimensional accuracy includes 7/16" head width and 11/64" head height for consistent tool engagement across applications.
