S-91247A372 1/2"-20 x 7" 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
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance through zinc plating extends service life in demanding environments
- Precision UNF fine threading with Class 2A fit provides secure fastening and vibration resistance
- Grade 5 steel construction with Rockwell C25 hardness delivers optimal durability and load-bearing capacity
- External hex drive design allows for easy installation and removal with standard tools
- Partial threading configuration offers improved grip strength and controlled clamping force
- Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental and safety standards are met
Professional Applications & Engineering Value
These Grade 5 steel hex head screws are engineered to solve critical fastening challenges in industrial machinery, construction equipment, and heavy-duty manufacturing applications. The 1/2"-20 UNF fine thread configuration provides superior resistance to vibration loosening, while the zinc plating offers essential corrosion protection in harsh operating environments. The partial threading design ensures maximum grip strength where needed, making these industrial hex screws ideal for structural connections requiring precise clamping force. With their external hex drive and standardized dimensions, they enable efficient assembly and maintenance procedures, reducing downtime in production facilities and mechanical systems.
Specification Summary & Compliance
This 7" hex head screw features Class 2A thread fit tolerance for precise engagement and meets ASME B18.2.1 specifications SAE J429. The fastener maintains dimensional accuracy with 1/2"-20 UNF fine thread pattern and 1 1/2" minimum thread length. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining the mechanical properties required for Grade 5 performance standards.
