S-91247A330 7/16"-20 x 4" 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 industrial applications, reducing the risk of fastener failure.
- Zinc plating finish provides excellent corrosion resistance, extending the service life of the screw in harsh environments.
- Grade 5 steel construction with Rockwell C25 hardness offers superior durability and resistance to wear, ideal for high-stress assemblies.
- UNF fine thread with Class 2A fit delivers precise, secure fastening with reduced likelihood of loosening under vibration.
- Partially threaded design allows for controlled clamping force and easier alignment in structural applications.
- External hex drive and hex head enable quick installation and high torque application with standard tools, boosting efficiency.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in professional settings.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical challenges in heavy-duty industrial and construction environments. Made from high-strength steel with a zinc-plated finish, it combats corrosion and wear, ensuring long-term reliability in outdoor or high-moisture settings. The UNF fine thread and Class 2A thread fit provide superior grip and vibration resistance, minimizing maintenance needs in machinery, automotive, and structural assemblies. With a partially threaded shank, it offers optimal load distribution, reducing stress concentrations and enhancing joint integrity. Ideal for applications requiring high tensile strength and compliance with rigorous standards, this fastener supports efficient, safe, and durable installations across various sectors.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and adheres to UNF thread standards with a fine thread spacing. It meets ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring dimensional accuracy and performance consistency. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in global supply chains.
