S-91286A281 7/16"-14 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 tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc-flake coating extends service life in harsh industrial environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under repetitive loading conditions.
- Precision Class 2A thread fit guarantees smooth assembly and secure fastening, improving installation efficiency.
- Partially threaded design offers optimal grip and clamping force control for specific engineering requirements.
- Heavy-duty Grade 8 classification meets rigorous ASME B18.2.1 and SAE J429 standards, ensuring consistent quality and reliability.
- Compliance with RoHS 3 and REACH regulations makes these screws suitable for global industrial supply chains without environmental restrictions.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 8 hex head screws combine high-strength steel construction with advanced zinc-flake coating to solve critical fastening challenges. The 7/16"-14 UNC coarse thread design ensures quick assembly in heavy machinery, structural steel connections, and automotive components where vibration resistance is paramount. The partially threaded configuration provides precise clamp load distribution, preventing joint loosening while the external hex drive allows for high-torque installation with standard tools. These screws deliver exceptional value in construction, manufacturing, and equipment maintenance by reducing downtime through superior corrosion resistance and mechanical reliability.
Specification Summary & Compliance
This 3" hex head screw features precise Class 2A thread fit with UNC coarse threading (7/16"-14) and right-hand thread direction. Manufactured to ASME B18.2.1 and SAE J429 specifications, it maintains dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial distribution and use.
