S-91247A863 3/4"-10 x 8" 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, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending the service life of the screw in harsh environments.
- Grade 5 classification and Rockwell C25 hardness offer a balance of strength and durability for repeated use.
- Coarse UNC threads and Class 2A thread fit facilitate easier and faster installation while maintaining secure connections.
- Partially threaded design with 2" minimum thread length allows for precise clamping force control in varied material thicknesses.
- External hex drive and 1 1/8" head width enable high-torque application with standard tools, improving assembly efficiency.
- Compliance with ASME B18.2.1, SAE J429, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for global sourcing.
Professional Applications & Engineering Value
This 3/4"-10 UNC Grade 5 hex head screw is engineered to address critical fastening challenges in heavy machinery, structural frameworks, and equipment assembly. The zinc plated steel construction combats rust and wear in outdoor or humid conditions, while the coarse thread design prevents cross-threading and ensures quick engagement in coarse-grained materials. With a partially threaded shank, it provides unthreaded grip length for enhanced shear resistance, making it ideal for bolting joints that experience dynamic loads. Its high tensile strength and external hex drive support robust connections in construction, automotive, and industrial manufacturing, reducing maintenance downtime and improving operational safety.
Specification Summary & Compliance
This fastener features a Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. It meets ASME B18.2.1 and SAE J429 specifications for consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and suitable for environmentally conscious procurement.
