S-92620A558 1/4"-20 x 5 1/2" 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
- Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh environments
- Precise thread engagement with Class 2A UNC coarse threads ensuring reliable installation and vibration resistance
- Enhanced durability through Rockwell C33 hardness, maintaining integrity under heavy mechanical stress
- Full-threaded design providing consistent clamping force along the entire 5½" length
- Standard-compliant performance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
- Optimized drive efficiency with external hex head design for high-torque 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 high-strength steel material and zinc yellow-chromate plating addresses critical challenges in construction, heavy machinery, and structural assemblies by providing both corrosion resistance and 150,000 psi tensile strength. The UNC coarse threads and Class 2A fit ensure rapid installation and reliable performance in vibration-prone applications, while the fully threaded design maintains consistent clamping force across the entire 5½" length. These heavy-duty screws are engineered to withstand extreme mechanical stress while meeting rigorous ASME B18.2.1 standards for industrial fastening solutions.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread form (1/4"-20). Complies with ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners, ensuring consistent quality and performance. Features include right-hand threading, external hex drive, and full threading along the 5½" length. The zinc yellow-chromate finish provides enhanced corrosion protection for extended service life in industrial applications.
