S-94173A311 5/16"-18 x 3" 12-Point Screws
12-Point Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
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Key Features & Benefits at a Glance
- Exceptional torque transmission with external 12-point drive design for reliable fastening in high-stress applications
- Superior corrosion resistance through black-oxide coating that protects against rust and extends service life
- High-strength performance with Rockwell C38 hardness and 170,000 psi tensile strength for demanding industrial environments
- Enhanced stability from the integrated flange that distributes load evenly and prevents loosening under vibration
- Optimized thread engagement with Class 2A UNC coarse threads ensuring quick assembly and reduced cross-threading risks
- Versatile partial threading that allows for precise clamping force control in various material thicknesses
- Reliable dimensional consistency with inch-system precision for seamless compatibility with existing equipment
Professional Applications & Engineering Value
This 12-point screw delivers critical engineering solutions where high torque requirements meet demanding environmental conditions. The black-oxide alloy steel construction provides excellent corrosion resistance while maintaining the 170,000 psi tensile strength needed for heavy machinery, automotive assemblies, and structural applications. The external 12-point drive enables superior torque transmission compared to standard hex drives, reducing tool slippage and fastener damage. With UNC coarse threads and partial threading, installation time decreases significantly while the integrated flange eliminates the need for separate washers, streamlining inventory and assembly processes in industrial maintenance and manufacturing operations.
Specification Summary & Compliance
Manufactured to precise inch-system dimensions with Class 2A thread fit ensuring consistent performance across applications. Complies with UNC thread standards (5/16"-18) and features Rockwell C38 hardness rating. The black-oxide surface treatment provides corrosion protection while maintaining dimensional integrity. Meets industry standards for heavy-duty fasteners and is suitable for applications requiring 170,000 psi tensile strength capabilities.
