S-91286A273 7/16"-14 x 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 tensile strength of 150,000 psi ensures reliable performance under extreme loads and vibrations in demanding industrial environments.
- Superior corrosion resistance from the zinc-flake coating significantly extends service life, reducing maintenance and replacement frequency.
- High hardness rating (Rockwell C33) provides excellent wear resistance and prevents thread deformation during installation and use.
- Coarse UNC threading with Class 2A fit allows for quicker assembly and better performance in applications with debris or minor misalignments.
- Partially threaded design offers optimal clamping force distribution, ideal for securing materials where unthreaded shank strength is critical.
- External hex drive enables high-torque installation with standard tools, ensuring secure fastening in high-stress applications.
- Full compliance with industry standards (ASME B18.2.1, SAE J429) guarantees dimensional accuracy and interchangeability for professional use.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to solve critical fastening challenges in heavy machinery, construction, and automotive assemblies. The zinc-flake coated steel construction combats rust and chemical exposure, making it suitable for outdoor and harsh industrial environments. Its 7/16"-14 UNC coarse thread ensures rapid installation and reliable holding power in structural applications, while the partial threading minimizes stress concentration. With a 2" length and external hex drive, it provides robust, vibration-resistant connections in equipment requiring high-strength fasteners that meet rigorous engineering specifications.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and adheres to ASME B18.2.1 and SAE J429 standards for dimensional consistency. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability in industrial supply chains.
