S-91283A148 1 1/8"-7 x 4 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 100,000 psi tensile strength, ideal for demanding structural applications
- Superior wear resistance due to Rockwell C19 hardness, extending service life in high-stress environments
- Reliable fastening performance with Class 2A thread fit, ensuring consistent clamping force and vibration resistance
- Optimized installation efficiency through the coarse UNC thread design, reducing assembly time in industrial settings
- Secure torque transmission enabled by the external hex drive and large 1 11/16" head width, preventing tool slippage
- Reduced material stress concentration with partially threaded shank design, minimizing risk of fatigue failure
- Full regulatory compliance meeting ASME B18.2.1, RoHS 3, and REACH standards for global industrial deployment
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver critical performance where structural integrity is paramount. The steel construction combined with 100,000 psi tensile strength provides exceptional resistance to dynamic loads and vibration-induced loosening in machinery assembly, construction frameworks, and transportation equipment. The 1 1/8"-7 UNC coarse thread profile ensures rapid installation in thick materials while maintaining superior pull-out resistance. Partially threaded design concentrates clamping force precisely where needed, preventing joint distortion in structural steel connections and heavy equipment manufacturing. With external hex drive compatibility and Class 2A thread fit, these screws offer consistent torque application and reliable performance in automated assembly environments.
Specification Summary & Compliance
This 4 1/2" length hex head screw features 1 1/8"-7 UNC coarse threads with Class 2A thread fit tolerance per ASME standards. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.
