S-91268A951 1 1/2"-6 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 strength for heavy loads with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance in high-stress applications.
- Superior wear resistance and durability due to Rockwell C33 hardness, extending service life in demanding industrial environments.
- Easy and quick installation with a 2 1/4" external hex head and coarse UNC threading, reducing assembly time and effort.
- Precise and secure thread engagement through Class 2A thread fit, minimizing the risk of cross-threading and ensuring consistent fastening.
- Full-length threading for maximum grip across the entire 3" length, providing uniform clamping force in thick materials or assemblies.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing interoperability and quality assurance.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for safe use.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and structural integrity are paramount. The steel material and fully threaded UNC coarse design ensure rapid installation and high fatigue strength, reducing maintenance downtime. Its external hex drive and right-hand thread facilitate straightforward torque application, making it ideal for bolting large components in industrial equipment. By combining 150,000 psi tensile strength with precise Class 2A thread fit, this fastener prevents loosening under dynamic loads, enhancing safety and longevity in demanding applications.
Specification Summary & Compliance
This product adheres to Class 2A thread fit and UNC coarse threading standards with a 1-1/2"-6 thread size and 3" length. It conforms to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use.
