S-91247A370 1/2"-20 x 6" 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
- Superior load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for demanding industrial applications
- Enhanced corrosion resistance through zinc plating, extending service life in harsh environments
- Precision thread engagement with Class 2A fit and UNF fine threading for secure, vibration-resistant connections
- Optimized torque transmission via external hex drive and 3/4" head width for efficient installation
- Versatile partial threading allowing both clamping and alignment functions in structural assemblies
- Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for global applications
- Consistent hardness performance with Rockwell C25 rating ensuring dimensional stability under stress
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver exceptional performance in construction machinery, structural steel connections, and manufacturing equipment. The zinc plated finish provides critical corrosion protection in environments exposed to moisture and chemicals, while the 1/2"-20 UNF fine threading maintains superior clamping force in high-vibration settings. The partially threaded design allows precise control over engagement depth, making them ideal for applications requiring both shear strength and alignment accuracy. With 6" length and external hex drive, these fasteners offer optimal accessibility in confined spaces while meeting rigorous ASME B18.2.1 specifications for dimensional consistency and reliability.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread tolerance with UNF fine thread profile (1/2"-20), ensuring precise fit and reliable performance. Complies with ASME B18.2.1 dimensional standards and SAE J429 Grade 5 mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Features Rockwell C25 hardness and 120,000 psi tensile strength for consistent performance in demanding applications.
