S-90166A123 5/16"-18 x 1 1/4" ASTM F593, IFI 111 Stainless Steel Flanged Hex Head Screws
Stainless Steel Flanged Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and reducing replacement costs
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Integrated flange design eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface
- Coarse UNC threading with Class 2A fit offers faster assembly and reliable engagement in a wide range of materials
- Full threading along the entire shank allows for maximum adjustability and secure fastening at any point
- External hex drive head enables high-torque installation with common tools, preventing stripping and ensuring a tight fit
- Rockwell B80 hardness provides excellent durability and resistance to wear over extended service life
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head flange screw is engineered to solve critical challenges in industrial assembly and construction. The 18-8 Stainless Steel material provides exceptional resistance to rust and chemical corrosion, making it perfect for outdoor equipment, marine applications, and food processing machinery where exposure to moisture is a concern. The flanged head distributes clamping force over a wider area, reducing surface pressure and preventing damage to softer materials. Combined with the coarse UNC thread and Class 2A fit, these screws ensure quick, secure fastening in structural frameworks, heavy-duty machinery, and automotive assemblies, delivering long-term reliability and reducing maintenance downtime.
Specification Summary & Compliance
This screw features a Class 2A thread fit for consistent assembly and a UNC coarse thread standard. 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 regulations, ensuring it is free of hazardous substances for safe use in various industrial and consumer applications.
