S-91247A610 5/16"-18 x 7 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
- Superior load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies
- Enhanced corrosion resistance through zinc plating, extending service life in demanding environments
- Reliable Grade 5 steel construction with Rockwell C25 hardness, ensuring consistent performance under vibration and shock loads
- Optimized partial threading design allowing precise clamping force control and reduced thread galling
- Standard-compliant UNC coarse threads with Class 2A fit for rapid installation and superior anti-loosening characteristics
- Industrial-grade hex head configuration providing secure tool engagement and high torque transmission capability
- Full regulatory compliance meeting ASME B18.2.1, SAE J429 standards while being RoHS 3 and REACH compliant
Professional Applications & Engineering Value
Engineered for heavy-duty fastening applications, this Grade 5 hex head screw delivers exceptional performance in construction, machinery assembly, and structural frameworks. The partially threaded design concentrates clamping force precisely where needed, preventing joint relaxation in vibrating environments. With 5/16"-18 UNC coarse threads and Class 2A thread fit, installation efficiency is maximized while maintaining secure connections. The zinc plated finish provides critical corrosion protection in industrial settings, while the external hex drive ensures compatibility with standard tools. This 7 1/2" steel fastener solves common engineering challenges including vibration-induced loosening, corrosion degradation, and installation inaccessibility.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread tolerance ensuring consistent fit. The UNC coarse thread profile conforms to ASME B18.2.1 specifications while meeting SAE J429 Grade 5 mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees material safety and regulatory acceptance for industrial applications worldwide.
