S-91286A262 3/8"-24 x 3" 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 capability with Grade 8 classification and 150,000 psi tensile strength for demanding industrial applications
- Superior corrosion protection through zinc-flake coating, extending service life in harsh environments
- Precise thread engagement with UNF fine threads and Class 2A fit ensuring reliable fastening in critical assemblies
- Optimized torque transmission via external hex drive design and 9/16" head width for secure installation
- Controlled thread engagement through partial threading design preventing over-tightening in deep applications
- Enhanced durability with Rockwell C33 hardness maintaining structural integrity under repeated stress
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards and environmental regulations
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 3/8"-24 UNF fine thread configuration provides superior vibration resistance compared to coarse threads, making them ideal for machinery, automotive assemblies, and structural frameworks subject to dynamic loads. The zinc-flake coating offers exceptional corrosion protection without hydrogen embrittlement risks, while the partially threaded design ensures precise clamping force distribution. With 150,000 psi tensile strength and Rockwell C33 hardness, these fasteners maintain integrity in high-stress environments, from construction equipment to manufacturing fixtures, where reliability and long-term performance are critical engineering requirements.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 3/8"-24 UNF fine threading and 3" length. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety. Features external hex drive with 9/16" head width and 15/64" head height for standard tool compatibility.
