S-91247A132 5/16"-24 x 5" 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 and Grade 5 classification for reliable performance in high-stress applications
- Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Precision fine threading (5/16"-24 UNF) with Class 2A fit ensures secure, vibration-resistant connections
- Optimized partial threading design provides maximum grip strength while reducing material weight
- External hex drive compatibility allows for high-torque installation using standard industrial tools
- Certified material hardness (Rockwell C25) maintains structural integrity under repeated stress cycles
- Full regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value through its zinc plated steel construction and UNF fine thread design. The combination of 120,000 PSI tensile strength and Rockwell C25 hardness addresses critical failure points in heavy machinery, structural steel connections, and industrial equipment where vibration resistance and load distribution are paramount. The partially threaded configuration concentrates strength at critical engagement points while the external hex drive enables precise torque application in confined spaces. These hex head screws solve common industrial fastening challenges including joint relaxation, material fatigue, and environmental degradation through their compliant design and protective zinc plating.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 5/16"-24 UNF fine threading and standardized dimensions per ASME B18.2.1 and SAE J429 specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe global distribution and use. The 5" length with 7/8" minimum thread length provides consistent engagement across industrial applications while maintaining dimensional accuracy throughout production.
