S-92620A292 7/8"-9 x 8 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 150,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness (Rockwell C33) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
- Coarse UNC threading with Class 2A fit allows for quick assembly and secure fastening, improving installation efficiency in heavy machinery.
- Partially threaded design offers optimal clamping force distribution, ideal for applications requiring precise joint compression.
- External hex drive and standard head dimensions ensure compatibility with common tools, facilitating easy installation and removal.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in regulated industrial settings.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial environments, where vibration, high loads, and corrosive conditions can compromise fastener integrity. The steel material with Rockwell C33 hardness and 150,000 psi tensile strength ensures durability under extreme stress, making it suitable for construction equipment, automotive assemblies, and machinery frames. The zinc yellow-chromate plating provides a robust barrier against rust and chemical exposure, extending service life in outdoor or humid settings. With its coarse UNC thread and Class 2A fit, it enables rapid installation and reliable grip in thick materials, reducing assembly time while maintaining ASME B18.2.1 compliance for safety-critical applications.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit tolerances and UNC coarse thread standards, ensuring precise dimensional accuracy. It meets ASME B18.2.1 and SAE J429 specifications for Grade 8 heavy-duty screws, with verified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for environmental safety.
