S-91286A291 7/16"-14 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with Grade 8 classification and 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc-flake coating that withstands harsh industrial environments
- Optimized torque transmission with external hex drive design and 5/8" head width for secure installation
- Reliable thread engagement featuring Class 2A thread fit and coarse UNC threading for vibration resistance
- Enhanced durability with Rockwell C33 hardness that maintains integrity under repeated stress
- Versatile partial threading allowing both secure clamping and adjustable positioning
- Regulatory compliance assurance meeting ASME, SAE, RoHS 3, and REACH standards for global applications
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The zinc-flake coated steel construction provides superior corrosion resistance in demanding environments, while the 7/16"-14 UNC coarse threading ensures reliable fastening in materials prone to vibration loosening. The partially threaded design offers optimal clamp load distribution, making these external hex drive screws ideal for machinery assembly, structural steel connections, and equipment manufacturing. With 5" length and Class 2A thread fit, they provide precise installation tolerance control, reducing the risk of cross-threading and ensuring consistent performance in critical industrial fastening solutions.
Specification Summary & Compliance
Manufactured to exacting ASME B18.2.1 and SAE J429 specifications, these screws feature Class 2A thread fit for consistent installation performance. The inch system measurement ensures dimensional accuracy with 7/16"-14 UNC coarse threads and right-hand thread direction. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental responsibility and workplace safety standards. The Grade 8 strength classification with 150,000 psi tensile strength and Rockwell C33 hardness verifies mechanical performance for the most demanding industrial applications.
