S-91247A649 3/8"-16 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
- Exceptional tensile strength of 120,000 PSI ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Zinc plating provides corrosion resistance, extending the screw's service life in various industrial environments.
- Grade 5 classification and Rockwell C25 hardness offer a robust balance of strength and durability for heavy-duty use.
- Coarse UNC threads and Class 2A thread fit facilitate quicker assembly and secure fastening, minimizing installation time.
- Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip lengths.
- External hex drive and hex head enable easy installation with standard tools, enhancing efficiency in maintenance and assembly.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in industrial settings.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical challenges in industrial fastening, such as vibration resistance and load-bearing requirements. Made from steel with a zinc-plated finish, it combats corrosion in harsh environments, reducing maintenance costs. The 3/8"-16 UNC coarse thread and Class 2A thread fit ensure secure connections in materials like metal and wood, preventing loosening under stress. With a tensile strength of 120,000 PSI and partial threading, it provides reliable performance in construction, machinery, and automotive assemblies, where high-strength industrial hex screws are essential for safety and longevity.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threads per inch system requirements. It meets manufacturing specifications under ASME B18.2.1 and SAE J429 for Grade 5 fasteners. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory adherence in global industrial markets.
