S-91247A345 7/16"-20 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 tensile strength with 120,000 psi rating ensures reliable performance in high-stress industrial applications
- Enhanced corrosion resistance through zinc plating protects against environmental degradation in demanding conditions
- Precise thread engagement with Class 2A fit and UNF fine threading provides secure fastening with reduced vibration loosening
- Optimized drive efficiency through external hex design and 5/8" head width enables high torque application with standard tools
- Grade 5 strength certification guarantees consistent mechanical properties and Rockwell C25 hardness for durable performance
- Partial threading design allows for both clamping and alignment functions in structural assemblies
- Comprehensive compliance with ASME, SAE, RoHS 3, and REACH standards ensures quality and environmental responsibility
Professional Applications & Engineering Value
This 7/16"-20 UNF Grade 5 hex head screw delivers exceptional engineering value for heavy machinery, structural steel connections, and industrial equipment assembly. The zinc plated steel construction provides critical corrosion protection in manufacturing environments, while the UNF fine threading maintains secure connections under vibration and dynamic loads. With partial threading and substantial 7 1/2" length, this fastener accommodates both thick material stacks and precise component alignment. The external hex drive and substantial head dimensions enable high-torque installation without stripping, making it ideal for maintenance operations and production line applications where reliability and quick assembly are paramount.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with 7/16"-20 UNF fine threading and right-hand thread direction. Complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features Rockwell C25 hardness and 120,000 psi tensile strength for consistent performance across industrial applications.
