S-92620A299 1 1/8"-7 x 4 1/2" 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 load-bearing capacity with Grade 8 strength and 150,000 psi tensile strength for reliable performance in high-stress applications.
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments.
- Optimized torque transmission through the external hex drive and hex head design, ensuring secure fastening and easy installation.
- Durable thread engagement with UNC coarse threading and Class 2A fit, reducing cross-threading risks and maintaining integrity under vibration.
- Enhanced material hardness at Rockwell C33, offering excellent wear resistance and durability for long-term use.
- Versatile partial threading allowing for precise clamping force control and effective use in varied assembly setups.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and reliability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where high tensile strength and corrosion resistance are paramount. The steel material combined with zinc yellow-chromate plating effectively combats rust and environmental degradation, reducing maintenance needs. Its UNC coarse thread and Class 2A thread fit provide secure fastening in high-vibration environments, minimizing loosening. The external hex drive ensures efficient torque application, speeding up assembly in industrial settings while the partial threading allows for adjustable grip length, making it ideal for structural connections and equipment framing that demand reliability under dynamic loads.
Specification Summary & Compliance
This fastener adheres to precise dimensional tolerances with a Class 2A thread fit and UNC thread standards, ensuring consistent performance. It meets ASME B18.2.1 and SAE J429 specifications for quality and safety. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and health regulations in global industrial supply chains.
