S-92620A817 5/8"-18 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
- Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating in harsh industrial environments
- Enhanced thread engagement with UNF fine threading for vibration resistance and secure fastening
- High-strength Grade 8 certification ensuring reliability under extreme mechanical stress
- Precision external hex drive for easy installation with standard tools and reduced stripping risk
- Full threading coverage providing consistent clamping force along the entire fastener length
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed performance
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery assembly, and structural frameworks where failure is not an option. The UNF fine thread pattern (5/8"-18) provides superior resistance to vibrational loosening compared to coarse threads, while the Class 2A thread fit ensures smooth installation without compromising holding power. The zinc yellow-chromate plating creates a protective barrier against corrosion in demanding environments, extending service life significantly. With Rockwell C33 hardness and full threading, these fasteners maintain integrity under repeated stress cycles, making them ideal for critical joints in automotive, manufacturing, and infrastructure projects where reliability and compliance with industrial standards are paramount.
Specification Summary & Compliance
This 5/8"-18 UNF fine thread hex head screw features Class 2A thread fit tolerances for precise engagement and meets ASME B18.2.1 and SAE J429 manufacturing specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets while maintaining the dimensional accuracy required for professional applications.
