S-91257A478 3/8"-24 x 10" 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 in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc yellow-chromate plating extends service life in harsh industrial and automotive environments.
- High hardness rating (Rockwell C33) provides excellent wear resistance and maintains thread integrity under repeated use.
- Fine UNF thread design (3/8"-24) offers enhanced clamping force and vibration resistance for secure, long-lasting connections.
- Partially threaded shank allows for precise grip length control, ideal for applications requiring specific unthreaded sections.
- Class 2A thread fit ensures easy assembly while maintaining consistent torque and load distribution.
- External hex drive design facilitates quick installation and removal with standard tools, improving maintenance efficiency.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty fastening, where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plating provides a durable barrier against oxidation and chemical exposure, making it suitable for automotive chassis, construction equipment, and industrial machinery. Its 3/8"-24 UNF fine thread design enhances vibration resistance in dynamic applications, while the partially threaded configuration allows for optimal stress distribution. Compliant with ASME B18.2.1 and SAE J429, this fastener delivers consistent performance in demanding environments, reducing maintenance downtime and ensuring operational safety.
Specification Summary & Compliance
This product features a Class 2A thread fit per UNF standards, ensuring precise dimensional accuracy and compatibility. It meets ASME B18.2.1 and SAE J429 specifications for material, mechanical properties, and manufacturing consistency. The zinc yellow-chromate finish complies with industry corrosion protection requirements, while the Grade 8 strength rating guarantees adherence to high-load performance criteria. All materials and processes align with relevant industrial regulations for reliability and safety.
