S-92620A754 1/2"-20 x 5" 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 tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance needs.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under heavy loads.
- Fine UNF threading (1/2"-20) offers enhanced grip and vibration resistance compared to coarse threads.
- Full threading along the 5" length allows for maximum adjustability and secure fastening in deep applications.
- External hex drive design enables easy installation and removal with standard tools, improving assembly efficiency.
- Compliance with ASME B18.2.1/SAE J429 standards guarantees consistent quality and interchangeability in industrial settings.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding industrial applications where high tensile strength and corrosion resistance are critical. The steel construction with zinc yellow-chromate plating effectively combats rust in outdoor or chemically exposed environments, such as construction machinery, automotive assemblies, and heavy equipment manufacturing. The UNF fine thread (1/2"-20) provides superior clamping force and vibration resistance, preventing loosening in dynamic loads. With a fully threaded 5" length and external hex drive, it ensures easy installation in deep-set or hard-to-reach areas, reducing assembly time and enhancing structural integrity in heavy-duty fastening scenarios.
Specification Summary & Compliance
This fastener features Class 2A thread fit for consistent engagement and ease of assembly, manufactured to ASME B18.2.1 and SAE J429 specifications. It meets dimensional and mechanical requirements for Grade 8 strength classification, including 150,000 psi tensile strength and Rockwell C33 hardness. The zinc yellow-chromate finish complies with RoHS and REACH environmental standards, ensuring safe use in regulated industries.
