S-90166A136 1/2"-13 x 1 1/4" 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 reducing maintenance costs
• Exceptional holding power from the integrated flange design, which distributes load and eliminates the need for a separate washer
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and in demanding structural applications
• Easy and secure installation with a standard 3/4" external hex head, allowing for high torque application with common tools
• Consistent and reliable thread engagement due to the Class 2A fit and coarse UNC thread, enabling faster assembly and reducing cross-threading risks
• Full threading along the 1-1/4" length provides maximum grip and adjustability in a wide range of material thicknesses
• Compliance with major industry standards including ASTM F593, ensuring material quality and mechanical properties for professional use

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered to solve critical challenges in industrial applications where corrosion resistance and structural integrity are paramount. The 18-8 Stainless Steel material provides excellent protection against rust and chemical exposure, making it ideal for use in marine, chemical processing, and outdoor construction. The flanged design increases the bearing surface, preventing pull-through in softer materials and providing a more secure, vibration-resistant joint. Combined with its 70,000 psi tensile strength and Rockwell B80 hardness, this screw delivers dependable performance in heavy machinery, structural steel connections, and infrastructure projects, ensuring long-term reliability and reducing the frequency of replacements and maintenance.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in accordance with ASTM F593 for consistent mechanical properties and material quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various markets and applications.