S-90166A139 1/2"-13 x 2" ASTM F593, IFI 111 Stainless Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability
• High tensile strength of 70,000 psi ensures secure fastening under heavy loads and vibration
• Flanged design eliminates the need for separate washers, providing wider bearing surface and faster installation
• Rockwell B80 hardness offers excellent durability and resistance to wear and deformation
• Coarse UNC threads enable quick assembly and reduced cross-threading risks in industrial applications
• Partial threading allows for precise clamp load control and improved joint stability
• External hex drive facilitates easy installation and removal with standard tools, enhancing workflow efficiency

Professional Applications & Engineering Value

These 1/2"-13 UNC hex head screws are engineered to address critical challenges in heavy-duty assembly, machinery, and structural applications. The 18-8 Stainless Steel material provides exceptional resistance to rust and chemical exposure, making them suitable for outdoor, marine, and chemical processing environments. The flanged design distributes pressure evenly, reducing surface damage and preventing loosening under dynamic loads. With a coarse thread profile and partial threading, these screws deliver reliable performance in wood, metal, and composite materials, minimizing installation time while maintaining high tensile strength and vibration resistance. Ideal for construction, automotive, and industrial equipment, they ensure long-term fastener integrity and reduced maintenance costs.

Specification Summary & Compliance

This hex head screw features a 1/2"-13 UNC thread with Class 2A fit for consistent dimensional accuracy and easy assembly. It meets ASTM F593 specifications for stainless steel fasteners, ensuring material and mechanical property consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and restricted substance adherence. Manufactured in the inch system, it includes a flange diameter of 1 5/64" and a minimum thread length of 1 1/4" for reliable performance in standardized industrial applications.