S-92620A697 7/16"-20 x 1 1/4" 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 capacity with 150,000 psi tensile strength, ideal for high-stress industrial applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
- Precise thread engagement with Class 2A UNF fine threads ensuring reliable, vibration-resistant connections
- Maximum hardness and durability through Rockwell C33 hardness rating, reducing wear and deformation under heavy loads
- Easy installation and removal with standard external hex drive and fully threaded design for consistent clamping force
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use
- Optimized for heavy machinery with Grade 8 strength classification, providing reliable performance in critical fastening applications
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial environments where fastener failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures these 7/16"-20 UNF threaded fasteners maintain structural integrity under extreme vibration and dynamic loading conditions. The zinc yellow-chromate plating provides superior corrosion protection, making them ideal for outdoor equipment, heavy machinery, and automotive applications where exposure to moisture and chemicals is common. The fully threaded design and Class 2A thread fit guarantee consistent clamping force distribution, preventing loosening in critical assemblies while the external hex drive allows for high-torque installation with standard tools.
Specification Summary & Compliance
This 1 1/4" length hex head screw features precise 7/16"-20 UNF fine threads with Class 2A thread fit tolerance for optimal engagement. Manufactured to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring certified components.
