S-92620A959 1"-8 x 3 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 strength and durability with Grade 8 classification, providing reliable performance in high-stress environments and reducing the risk of fastener failure.
- Superior corrosion resistance due to zinc yellow-chromate plating, extending service life in harsh or outdoor industrial settings.
- High tensile strength of 150,000 PSI ensures secure fastening under heavy loads, ideal for demanding mechanical and structural applications.
- Precise Class 2A thread fit allows for easy assembly and consistent engagement, minimizing cross-threading and improving installation efficiency.
- Coarse UNC threads offer quick installation and better resistance to vibration loosening compared to fine threads.
- External hex drive design enables straightforward tightening with common tools, speeding up maintenance and assembly processes.
- Full threading along the 3 1/4" length provides versatile grip depth and uniform stress distribution for enhanced joint integrity.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial applications, such as construction, machinery assembly, and infrastructure projects. Made from high-strength steel and finished with zinc yellow-chromate plating, it combats corrosion and wear, reducing maintenance costs and downtime. The coarse UNC thread and Class 2A fit ensure reliable performance in high-vibration environments, preventing loosening and ensuring long-term stability. With a tensile strength of 150,000 PSI and Rockwell C33 hardness, it provides a robust solution for securing heavy components, enhancing safety and operational efficiency in sectors like manufacturing and automotive engineering.
Specification Summary & Compliance
This fastener adheres to precise dimensional standards, including Class 2A thread fit and UNC coarse threads with a size of 1"-8. It meets ASME B18.2.1 and SAE J429 specifications for consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.
