S-91268A194 5/16"-18 x 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 150,000 psi tensile strength for reliable performance in high-stress industrial applications
- Superior corrosion resistance and durability through Grade 8 steel construction with Rockwell C33 hardness
- Optimized thread engagement with 5/16"-18 UNC coarse threading providing superior grip in various materials
- Enhanced installation efficiency through external hex drive design allowing for high-torque application
- Precise thread fit control with Class 2A tolerance ensuring consistent performance and easy assembly
- Strategic load distribution via partially threaded design that concentrates strength where needed most
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards and environmental regulations
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional mechanical properties that address critical fastening challenges. The 5/16"-18 UNC coarse thread configuration provides superior pull-out resistance in structural steel, heavy machinery, and construction applications where vibration resistance is paramount. The partially threaded design concentrates the 150,000 psi tensile strength at the critical engagement zone while the external hex drive accommodates high-torque installation tools. Manufactured from Grade 8 steel with Rockwell C33 hardness, these fasteners withstand extreme mechanical stress while maintaining integrity in corrosive environments, making them ideal for automotive, manufacturing, and infrastructure projects requiring reliable, long-term fastening solutions.
Specification Summary & Compliance
This 2" length hex head screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threading and partial threading design. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing assurance for sustainable procurement and usage in regulated industries.
