S-91268A740 9/16"-12 x 3" 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 applications, reducing the risk of fastener failure.
- Grade 8 steel construction with Rockwell C33 hardness provides superior durability and resistance to wear in demanding environments.
- Coarse UNC threading allows for quick installation and secure holding power, ideal for heavy-duty assemblies.
- Partial threading design offers optimal grip and vibration resistance, maintaining joint integrity under dynamic loads.
- Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, minimizing assembly issues.
- External hex drive facilitates easy torque application with standard tools, speeding up maintenance and repairs.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees quality and interchangeability for industrial applications.
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 durability are paramount. Made from robust steel with a Rockwell C33 hardness, it resists deformation and fatigue under extreme loads. The 9/16"-12 UNC coarse thread pattern ensures rapid assembly and reliable performance in vibrating environments, while the partial threading enhances clamp load distribution. Ideal for securing structural components, this external hex drive screw simplifies maintenance with standard tools, reducing downtime and ensuring long-term operational safety in compliance with industry standards.
Specification Summary & Compliance
This screw adheres to precise dimensional tolerances with a Class 2A thread fit and UNC coarse thread standards, manufactured under ASME B18.2.1 and SAE J429 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.
