S-91247A251 3/8"-24 x 8" 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 under high-stress conditions, reducing the risk of fastener failure.
- Zinc plating finish provides superior corrosion resistance, extending service life in harsh industrial environments.
- Partially threaded design offers optimal clamping force and vibration resistance, ideal for applications requiring precise joint integrity.
- UNF fine threading with Class 2A fit delivers secure, accurate engagement and easy assembly, minimizing cross-threading issues.
- Grade 5 strength classification and Rockwell C25 hardness guarantee consistent durability and load-bearing capacity for heavy-duty use.
- External hex drive and hex head allow for straightforward installation and high-torque application with standard tools.
- Compliance with ASME B18.2.1 and SAE J429 standards ensures dimensional accuracy and interoperability in regulated industries.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical challenges in industrial assembly, such as maintaining joint stability under dynamic loads. The 3/8"-24 UNF fine thread and partially threaded configuration provide enhanced grip and resistance to loosening, making it ideal for machinery, automotive, and structural applications where vibration is a concern. Constructed from zinc plated steel, it combats corrosion in outdoor or humid settings, while the external hex drive facilitates quick, secure fastening with common wrenches. By integrating high tensile strength and precise thread fit, this fastener delivers reliable performance in demanding environments, reducing maintenance needs and downtime.
Specification Summary & Compliance
This product features a Class 2A thread fit for consistent dimensional accuracy, adhering to UNF fine thread standards with a size of 3/8"-24. It meets ASME B18.2.1 and SAE J429 specifications for manufacturing quality, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.
