S-97972A315 3/8"-16 x 1 1/4" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 180,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide steel finish prolongs service life in harsh industrial and outdoor environments.
• Flanged design eliminates the need for a separate washer, providing a wider bearing surface for enhanced load distribution and assembly stability.
• Coarse UNC threading with Class 2A fit offers quick installation and secure fastening, minimizing cross-threading and improving joint integrity.
• External hex drive and hex head allow for high-torque application with standard tools, speeding up assembly and disassembly processes.
• Fully threaded shank maximizes grip length and adjustability, ensuring consistent clamping force across varied material thicknesses.
• Rockwell C38 hardness provides excellent wear resistance, maintaining thread integrity and durability through repeated use.

Professional Applications & Engineering Value

Engineered for demanding environments, this 3/8"-16 UNC hex head screw in black-oxide steel addresses critical challenges in industrial and construction settings. Its coarse thread spacing and Class 2A thread fit deliver rapid installation and robust holding power, reducing assembly time while preventing loosening under vibration. The flanged feature distributes pressure evenly, minimizing surface damage and enhancing structural stability in machinery, steel framing, and heavy equipment. With a tensile strength of 180,000 PSI and corrosion-resistant coating, it withstands extreme loads and environmental exposure, ensuring long-term reliability in applications like automotive assemblies, infrastructure projects, and manufacturing systems where fastener failure is not an option.

Specification Summary & Compliance

This screw adheres to UNC thread standards with Class 2A thread fit for consistent dimensional accuracy and interchangeability. It features a right-hand thread direction, fully threaded design, and precise dimensions including a 1 1/4" length, 5/16" head height, and 7/16" head width. Manufactured to meet industry specifications for high-strength fasteners, it complies with relevant material and performance standards, ensuring reliability in professional use. The black-oxide finish provides added protection, aligning with common industrial requirements for durability and corrosion resistance.