S-90166A137 1/2"-13 x 1 1/2" 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 industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B80 hardness for heavy-duty applications
• Reliable thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Integrated flange design provides wider bearing surface, eliminating the need for separate washers
• Full threading along 1-1/2" length enables maximum adjustability and load distribution
• External hex drive compatibility allows for standard wrenching tools and high-torque installation
• Comprehensive compliance with ASTM F593, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw delivers critical performance in demanding industrial fastening scenarios where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel material inherently resists oxidation and chemical exposure, making it suitable for outdoor machinery, marine equipment, and food processing facilities. Its coarse thread design and Class 2A thread fit prevent cross-threading during assembly while maintaining consistent clamping force under dynamic loads. The flanged head distributes pressure evenly across joined surfaces, reducing point stress and material deformation. Engineered to meet ASTM F593 specifications, this fully threaded external hex drive screw provides reliable, long-term fastening solutions for structural frameworks, heavy equipment assembly, and infrastructure projects requiring 70,000 psi tensile strength.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 1/2"-13 UNC coarse threads maintaining Class 2A tolerance for consistent fit. Fully compliant with ASTM F593 (IFI 111) manufacturing standards, ensuring mechanical properties and dimensional accuracy. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming absence of restricted hazardous substances. Thread direction: right hand; Threading: fully threaded; Length: 1-1/2"; Hardness: Rockwell B80.