S-92865A643 3/8"-16 x 4 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 load-bearing capability with 120,000 PSI tensile strength, ideal for high-stress industrial assemblies
- Superior corrosion resistance due to zinc plating, extending service life in harsh environments
- Reliable fastening performance with Grade 5 steel and Rockwell C25 hardness, preventing stripping and deformation
- Easy installation and removal with external hex drive and coarse UNC threading, reducing assembly time
- Precise thread engagement ensured by Class 2A thread fit, minimizing cross-threading risks
- Full-length threading provides consistent grip along the entire 4 1/2" length for versatile applications
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing interchangeability and safety
Professional Applications & Engineering Value
This 3/8"-16 UNC Grade 5 steel hex head screw is engineered to address critical challenges in industrial fastening, such as vibration loosening and material fatigue. The zinc plated finish offers a protective barrier against moisture and chemicals, significantly reducing corrosion-related failures in outdoor or humid settings. Its coarse thread design and Class 2A thread fit enable quick, secure installations in metals and other rigid materials, while the external hex drive allows for high-torque application with standard tools. Ideal for machinery, structural frameworks, and heavy equipment, this fastener delivers consistent performance under dynamic loads, ensuring long-term reliability in demanding engineering applications.
Specification Summary & Compliance
This hex head screw adheres to Class 2A thread tolerance for consistent fit and UNC coarse thread standards for ease of use. Manufacturing follows ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for industrial use.
