S-92620A335 1 1/4"-7 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 load-bearing capacity with Grade 8 strength and 150,000 psi tensile strength for reliable performance in high-stress industrial applications.
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh or outdoor environments.
- Optimized for quick assembly with a coarse UNC thread and external hex drive, allowing for efficient installation with standard tools.
- Enhanced durability and wear resistance due to Rockwell C33 hardness, reducing the risk of stripping or deformation under torque.
- Precise thread fit with Class 2A tolerance ensuring consistent engagement and reducing the likelihood of cross-threading in machinery.
- Versatile partial threading design offering a non-threaded shank for improved shear strength and alignment in structural connections.
- Compliance with rigorous standards including ASME B18.2.1, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.
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 1-1/4"-7 UNC coarse thread and partially threaded design provide superior grip and vibration resistance, minimizing loosening in dynamic loads. Made from robust steel and finished with zinc yellow-chromate plating, it withstands exposure to moisture and chemicals, reducing maintenance needs. Ideal for bolting structural frames, engine components, and industrial equipment, this fastener ensures long-term reliability and compliance with ASME B18.2.1 specifications, delivering consistent performance in demanding environments.
Specification Summary & Compliance
This product adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse thread for consistent assembly. It meets ASME B18.2.1 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
