S-91247A245 3/8"-24 x 6 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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
- High tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure under heavy loads.
- Zinc plating provides excellent corrosion resistance, extending service life in harsh industrial environments and reducing maintenance costs.
- Grade 5 classification guarantees consistent mechanical properties and durability, meeting rigorous standards for medium-strength applications.
- Class 2A thread fit offers smooth assembly and disassembly while maintaining secure fastening, improving installation efficiency.
- Partially threaded design allows for precise clamping force distribution, ideal for applications requiring vibration resistance and joint stability.
- External hex drive enables easy installation with common tools, speeding up assembly processes in time-sensitive projects.
- Fine UNF threads deliver superior holding power in materials prone to stripping, enhancing connection integrity.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 5 hex head screw combines high tensile strength and zinc-plated steel construction to address critical challenges in machinery assembly, structural frameworks, and automotive components. The 3/8"-24 UNF fine thread design ensures secure fastening in materials where coarse threads may compromise grip, while the partially threaded shank concentrates clamping force precisely, reducing loosening from vibrations. With a Rockwell C25 hardness, it resists wear and deformation under stress, making it suitable for dynamic loads in construction and manufacturing. Compliant with ASME B18.2.1 and SAE J429 standards, it provides reliability in environments demanding consistent performance and safety.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances for smooth assembly and meets ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical integrity. It is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming environmental safety and regulatory adherence for global supply chains.
