S-92620A615 5/16"-24 x 3 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
- Exceptional load-bearing capability with 150,000 psi tensile strength for high-stress applications
- Superior corrosion resistance provided by zinc yellow-chromate plating for extended service life
- Precise thread engagement with UNF fine threads and Class 2A fit ensuring reliable fastening
- Maximum thread utilization through full threading along the entire 3½" length
- High durability from Rockwell C33 hardness maintaining performance under heavy loads
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications
- Easy installation and removal with external hex drive design for efficient maintenance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial environments where failure is not an option. The zinc yellow-chromate plated steel construction provides superior protection against corrosion, extending service life in harsh conditions while maintaining the 150,000 psi tensile strength required for structural applications. The UNF fine thread configuration offers enhanced vibration resistance compared to coarse threads, making these fully threaded screws ideal for machinery, heavy equipment, and construction applications where precise clamping force and reliable performance are paramount. The external hex drive allows for high torque application, ensuring secure fastening in critical joints that experience dynamic loads and stress cycles.
Specification Summary & Compliance
This 5/16"-24 hex head screw features precision Class 2A thread fit tolerances with right-hand UNF fine threading and full thread coverage along its 3½" length. Manufactured to meet ASME B18.2.1 dimensional standards and SAE J429 Grade 8 mechanical properties, ensuring consistent performance and interchangeability. The fastener maintains Rockwell C33 hardness and delivers 150,000 psi tensile strength for reliable operation in heavy-duty applications requiring certified mechanical performance.
