S-91268A627 7/8"-9 x 6" 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 load-bearing capacity with 150,000 psi tensile strength, ideal for high-stress industrial assemblies
- Superior corrosion resistance thanks to the black-oxide finish, extending service life in harsh environments
- Reliable fastening performance with Grade 8 classification and Rockwell C33 hardness for consistent durability
- Easy installation and removal using standard tools due to the external hex drive and coarse UNC threads
- Optimized thread engagement with partial threading, reducing weight while maintaining secure connections
- Precise fit and interchangeability ensured by Class 2A thread fit and adherence to ASME B18.2.1 standards
- Safe for regulated industries with compliance to RoHS 3 and REACH, meeting environmental and safety requirements
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where high tensile strength and corrosion resistance are paramount. The black-oxide finish on steel material provides a protective layer against oxidation and wear, significantly reducing maintenance needs in outdoor or humid conditions. With a coarse UNC thread and partial threading, it offers faster assembly and reduced risk of cross-threading, while the external hex drive allows for high torque application without slippage. Ideal for structural frames, equipment mounts, and industrial fixtures, this 7/8"-9 UNC hex head screw delivers reliable performance under dynamic loads, ensuring long-term joint integrity and minimizing downtime in demanding applications.
Specification Summary & Compliance
This fastener features a 7/8"-9 UNC thread size with Class 2A thread fit for precise dimensional accuracy and easy assembly. It meets ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in environmentally conscious and regulated industrial markets.
