S-97972A311 3/8"-16 x 3/4" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 180,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance thanks to black-oxide steel construction that withstands harsh industrial environments
• Enhanced installation efficiency with external hex drive and flanged design providing secure grip and eliminating need for separate washers
• Precise thread engagement through Class 2A thread fit ensuring consistent fastening and vibration resistance
• Optimized for heavy machinery featuring UNC coarse thread spacing that resists loosening under dynamic loads
• Full-threaded design maximizing holding power across the entire 3/4" length for superior joint integrity
• Rockwell C38 hardness rating delivering excellent wear resistance and durability in high-stress applications

Professional Applications & Engineering Value

These black-oxide steel hex head screws are engineered to solve critical fastening challenges in industrial settings where vibration, heavy loads, and environmental factors compromise joint integrity. The 3/8"-16 UNC coarse thread configuration provides superior resistance to loosening in machinery, construction equipment, and automotive assemblies, while the flanged design distributes clamping force evenly, preventing surface damage and reducing installation time. The external hex drive allows for high-torque application with standard tools, making these fully threaded screws ideal for structural connections, heavy-duty frames, and equipment requiring 180,000 psi tensile strength. The black-oxide finish offers essential corrosion protection in manufacturing facilities, outdoor applications, and environments with moderate chemical exposure.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance across industrial applications. Complies with UNC thread standards and features right-hand threading with coarse spacing (16 TPI). The black-oxide steel construction meets industry requirements for corrosion resistance and durability. These hex head screws maintain dimensional accuracy with specified head height (5/16"), head width (7/16"), and flange diameter (5/8") for reliable compatibility with standard tools and mounting surfaces.