S-90166A138 1/2"-13 x 1 3/4" 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 extended service life
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Flange design eliminates need for separate washers, speeding up assembly and providing a larger bearing surface
• External hex drive allows for high-torque installation with common tools, reducing stripping risk
• Coarse UNC threads and Class 2A fit enable quick, secure fastening even in softer materials
• Full threading along the 1-3/4" length offers maximum grip and adjustment flexibility
• 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 from 18-8 stainless steel to solve critical challenges in industrial settings, such as corrosion in marine, chemical, or outdoor applications. The flanged design distributes clamp load effectively, preventing surface damage and loosening under dynamic loads. With a coarse thread and external hex drive, it ensures rapid, secure fastening in structural assemblies, machinery, and heavy equipment, reducing installation time and maintenance costs. Its fully threaded shank and high tensile strength make it a dependable choice for demanding industrial hex bolt applications where reliability is non-negotiable.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit for consistent assembly and meets ASTM F593 specifications for material and mechanical properties. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental and safety standards are met for global industrial use.