S-91268A864 3/4"-10 x 4 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 150,000 psi tensile strength for demanding industrial applications
- Superior durability and wear resistance thanks to Grade 8 steel construction and Rockwell C33 hardness
- Reliable fastening performance with Class 2A thread fit ensuring precise engagement and vibration resistance
- Easy installation and removal with external hex drive design and coarse UNC threading
- Optimized strength-to-weight ratio through partial threading design that concentrates material where needed
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable operations
Professional Applications & Engineering Value
This Grade 8 steel hex head screw delivers critical performance in heavy machinery, structural steel connections, and industrial equipment where high tensile strength and vibration resistance are paramount. The 3/4"-10 UNC coarse threading provides rapid installation in thick materials while maintaining exceptional clamping force. The partially threaded design concentrates strength in the shank while allowing for precise tension control. With Rockwell C33 hardness, this fastener resists wear and deformation under extreme loads, making it ideal for construction, manufacturing, and automotive applications where reliability cannot be compromised. The external hex drive ensures compatibility with standard tools for efficient maintenance and assembly operations.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit per UNC standards with 3/4"-10 coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The fastener is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental standards for industrial components.
