S-97972A519 1/2"-13 x 2 1/2" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Superior tensile strength rated at 180,000 psi for reliable performance in high-stress applications
• Optimized torque transmission through external hex drive and 9/16" head width for secure installation
• Integrated flange design eliminates need for separate washers while distributing clamping force evenly
• Precision UNC coarse threading with Class 2A fit ensures smooth assembly and consistent engagement
• Rockwell C38 hardness provides excellent wear resistance and durability under repeated use
• Partial threading configuration allows for precise clamping control in various material thicknesses

Professional Applications & Engineering Value

This black-oxide steel hex head screw delivers exceptional engineering value in demanding industrial applications where corrosion resistance and structural integrity are paramount. The UNC coarse thread configuration provides rapid installation in steel frameworks, machinery assembly, and structural connections, while the integrated flange eliminates washer migration and distributes load across wider surface areas. The partial threading design allows unthreaded shank sections to function as precision dowels in alignment-critical assemblies. With 180,000 psi tensile strength and Rockwell C38 hardness, this fastener maintains clamping force under vibration and dynamic loads, making it ideal for heavy equipment, construction machinery, and industrial manufacturing applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance for consistent engagement and UNC coarse thread specifications (1/2"-13). The screw features a 9/16" hex head width with 15/32" head height for standard tool compatibility. Compliant with ASME/ANSI standards for inch-system fasteners and meets industry requirements for heavy-duty industrial applications. The black-oxide surface treatment provides corrosion protection while maintaining dimensional accuracy across all critical parameters including the 27/32" flange diameter and 2 1/2" overall length.