S-91247A414 9/16"-18 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
- Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
- High tensile strength of 120,000 psi ensures reliable performance in demanding heavy-duty applications
- Fine UNF threading (9/16"-18) provides excellent vibration resistance and secure fastening in machinery
- Grade 5 strength classification with Rockwell C25 hardness delivers consistent durability and load-bearing capacity
- External hex drive design allows for easy installation and removal with standard tools
- Partially threaded configuration offers optimal grip and clamping force for structural assemblies
- Precision Class 2A thread fit ensures smooth installation and consistent performance across applications
Professional Applications & Engineering Value
This 9/16"-18 UNF hex head screw delivers exceptional engineering value through its Grade 5 steel construction and zinc plated finish, specifically designed to address industrial fastening challenges. The fine thread configuration provides superior resistance to vibration loosening in machinery, equipment, and structural applications where reliability is critical. With partial threading and external hex drive, it offers optimal clamping force while enabling quick installation in confined spaces. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures these industrial hex screws maintain integrity under heavy loads, making them ideal for construction, manufacturing, and automotive applications where failure is not an option.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe use across various industrial sectors.
