S-94173A348 1/2"-20 x 6" 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 170,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance from black-oxide coating that protects against rust and extends service life
• Enhanced torque transmission through the external 12-point drive design, preventing tool slippage during installation
• Precise thread engagement with Class 2A UNF fine threads ensuring secure, vibration-resistant connections
• Optimized weight distribution from the integrated flange that increases bearing surface and stability
• Reduced assembly time with partially threaded design that allows for faster installation in specific applications
• Consistent hardness performance at Rockwell C38 for maintained structural integrity under stress

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this black-oxide alloy steel 12-point screw addresses critical fastening challenges in construction, machinery, and automotive assemblies. The combination of UNF fine threading and Class 2A thread fit ensures precise alignment and superior vibration resistance in high-stress environments. The external 12-point drive delivers maximum torque transmission without cam-out, while the flanged design distributes clamping force evenly, preventing surface damage. The black-oxide surface treatment provides essential corrosion protection in harsh operating conditions, making these partially threaded screws ideal for applications requiring both structural integrity and long-term reliability.

Specification Summary & Compliance

This 12-point screw features 1/2"-20 UNF fine threads with Class 2A thread fit tolerance for precise engagement. The 6" length and partial threading (minimum 1-1/4" thread length) meet standard dimensional requirements. Manufactured from alloy steel with Rockwell C38 hardness and 170,000 psi tensile strength, it complies with industry standards for heavy-duty fasteners. The black-oxide finish provides corrosion resistance while maintaining dimensional accuracy. Product conforms to relevant industrial specifications for material composition and mechanical properties.