S-91268A900 7/8"-9 x 2 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 load-bearing capacity with a tensile strength of 150,000 psi, ideal for high-stress structural connections.
- Superior durability and wear resistance due to Grade 8 steel and Rockwell C33 hardness, reducing replacement frequency.
- Reliable and quick installation with a coarse UNC thread and external hex drive, minimizing assembly time.
- Precise thread fit (Class 2A) ensures consistent engagement and vibration resistance in demanding environments.
- Full threading along the 2 1/2" length provides maximum grip and adjustability for varied material thicknesses.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees interchangeability and performance in industrial applications.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where failure is not an option. The 7/8"-9 UNC coarse thread and fully threaded design ensure rapid installation and superior holding power in thick materials, reducing the risk of loosening under dynamic loads. Made from high-strength steel with a Rockwell C33 hardness, it resists deformation and fatigue, making it ideal for bolting structural frames, engine components, and industrial equipment. The external hex drive allows for high-torque application with standard tools, streamlining maintenance and assembly processes in heavy-duty applications while adhering to strict ASME B18.2.1 specifications for reliability.
Specification Summary & Compliance
This fastener features a 7/8"-9 UNC coarse thread with Class 2A fit for precise dimensional accuracy, ensuring consistent performance. It meets ASME B18.2.1 and SAE J429 standards, confirming its suitability for industrial use. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally safe and regulated procurement.
