S-97972A517 1/2"-13 x 2" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through black-oxide steel coating, extending service life in harsh industrial environments
• Superior load-bearing capability with 180,000 PSI tensile strength for heavy-duty applications requiring maximum reliability
• Optimized torque transmission via external hex drive design, ensuring secure installation and preventing tool slippage
• Simplified alignment and increased bearing surface with integrated flange, distributing clamp load more effectively
• Faster installation in coarse materials using UNC coarse threading, reducing assembly time while maintaining Class 2A precision fit
• Controlled thread engagement through partial threading design, preventing over-tightening in critical joint sections
• Exceptional hardness performance at Rockwell C38, maintaining structural integrity under repeated stress and vibration

Professional Applications & Engineering Value

This black-oxide steel hex head screw delivers critical engineering advantages for industrial assembly challenges. The 1/2"-13 UNC coarse thread configuration enables rapid installation in structural steel, heavy machinery, and construction applications where time efficiency matters. The partially threaded design provides precise clamp force control, preventing thread damage in soft materials while the external hex drive ensures maximum torque application without cam-out. The flanged head eliminates need for separate washers, streamlining assembly while providing superior load distribution. With 180,000 PSI tensile strength and corrosion-resistant black-oxide finish, these screws maintain joint integrity in high-vibration environments, making them ideal for automotive frames, industrial equipment, and structural steel connections where failure is not an option.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit ensuring consistent interchangeability and proper clearance. The UNC coarse thread profile follows standardized threading specifications for reliable performance. Complies with industry standards for heavy-duty fasteners including applicable ASME specifications. The black-oxide surface treatment provides corrosion protection while maintaining dimensional accuracy. Rockwell C38 hardness and 180,000 PSI tensile strength verify mechanical properties suitable for demanding industrial applications.