S-97972A121 1/4"-20 x 2" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating for extended service life in harsh industrial environments
• Superior load-bearing capacity with 180,000 psi tensile strength to withstand extreme mechanical stress
• Optimized thread engagement through UNC coarse threading and Class 2A fit for reliable fastening in various materials
• Increased installation efficiency with external hex drive design allowing high-torque application using standard tools
• Improved joint stability through integrated flange design that distributes clamping force evenly
• Reduced material fatigue with Rockwell C38 hardness maintaining structural integrity under repeated loads
• Versatile partial threading providing both secure engagement and clearance where needed

Professional Applications & Engineering Value

These black-oxide steel hex head screws deliver exceptional performance in demanding industrial applications where corrosion resistance and high tensile strength are critical. The UNC coarse thread configuration ensures rapid installation and reliable holding power in various substrates, while the Class 2A thread fit provides consistent engagement without binding. The integrated flange design eliminates the need for separate washers, streamlining assembly processes in automotive, construction, and heavy machinery applications. The partially threaded shank allows for precise clamping force control, making these industrial hex screws ideal for applications requiring both secure fastening and vibration resistance. The combination of external hex drive and robust material properties ensures these fasteners can withstand the rigorous demands of production environments while maintaining their structural integrity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. These UNC coarse thread screws feature a 1/4"-20 thread size with 2" length and partial threading. The fasteners comply with industry standards for inch fasteners and are produced using materials that meet relevant industrial specifications for mechanical properties and performance characteristics.