S-91247A455 5/8"-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
- High tensile strength of 120,000 psi ensures reliable performance in demanding industrial applications
- Superior corrosion resistance through zinc plating extends service life in harsh environments
- Precision UNF fine threading with Class 2A fit provides secure fastening and vibration resistance
- Grade 5 strength classification with Rockwell C25 hardness delivers consistent mechanical properties
- External hex drive design allows for easy installation and removal with standard tools
- Partial threading configuration optimizes grip strength while reducing material usage
- Comprehensive compliance with ASME, SAE, RoHS 3, and REACH standards ensures quality and safety
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value through its zinc plated steel construction and 5/8"-18 UNF fine threading. The combination of 120,000 psi tensile strength and Rockwell C25 hardness makes it ideal for heavy machinery, structural assemblies, and equipment requiring reliable fastening under substantial loads. The partially threaded design provides optimal clamping force distribution while the external hex drive ensures straightforward installation in confined spaces. Engineered to withstand vibration and environmental stressors, this fastener solves critical challenges in manufacturing, construction, and industrial maintenance applications where joint integrity is paramount.
Specification Summary & Compliance
This 7 1/2" hex head screw features precise Class 2A thread fit with 5/8"-18 UNF fine threading and 1 3/4" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 5 specifications, it ensures dimensional accuracy and mechanical consistency. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring verified material safety and performance standards.
