S-90166A142 1/2"-13 x 3" 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 dependable performance under heavy loads and vibration.
• Integrated flange design eliminates the need for a separate washer, providing a larger bearing surface and faster installation.
• Class 2A thread fit offers consistent, free-running assembly with standard nuts, reducing the risk of cross-threading.
• Partially threaded shank allows for precise clamping force on specific joint sections, enhancing joint integrity.
• External hex drive and coarse UNC threads enable quick installation and high torque application with common tools.
• Rockwell B80 hardness provides excellent durability and resistance to wear during repeated use.

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered to solve critical challenges in industrial assembly and construction. Manufactured from 18-8 Stainless Steel, it delivers exceptional corrosion resistance, making it suitable for outdoor, marine, and chemical processing applications where moisture and corrosive agents are present. The flanged head distributes clamping force over a wider area, reducing surface pressure and preventing material damage, which is vital for sheet metal or composite assemblies. Its partially threaded design ensures that the unthreaded portion bears directly on the joint, providing superior shear strength and vibration resistance. Combined with a coarse thread and external hex drive, it allows for rapid installation in high-volume production lines, minimizing downtime and labor costs while maintaining high-strength performance.

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. Key dimensions include a 3" length, 1 5/64" flange diameter, and a minimum thread length of 1 1/4". It is manufactured in compliance with ASTM F593 specifications for stainless steel bolts, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free from hazardous substances and safe for various industrial uses.