S-91286A267 7/16"-14 x 1" 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, preventing fastener failure in critical applications.
- Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
- High hardness rating of Rockwell C33 minimizes wear and deformation, maintaining structural integrity over repeated use.
- Coarse UNC threading with Class 2A fit allows for faster assembly and reliable grip in a variety of materials.
- Full threading along the entire 1" length provides maximum engagement and clamping force where needed.
- External hex drive design offers high torque capability and easy installation with standard tools.
- Compliance with major standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interchangeability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding applications where failure is not an option. The zinc-flake coated steel construction provides excellent resistance to corrosion, making it ideal for outdoor machinery, automotive assemblies, and structural frameworks exposed to moisture and chemicals. The coarse UNC thread pattern and Class 2A thread fit ensure quick, secure fastening in both soft and hard materials, reducing installation time while maintaining vibration resistance. With a tensile strength of 150,000 PSI and Rockwell C33 hardness, it handles high-stress environments—from heavy equipment manufacturing to construction projects—where durability and reliability are paramount. The external hex drive allows for high-torque application, ensuring tight, secure connections in industrial settings.
Specification Summary & Compliance
This fastener features a 7/16"-14 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy. It is manufactured in compliance with ASME B18.2.1 and SAE J429 specifications, ensuring consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and international markets.
