S-90166A112 1/4"-20 x 5/8" 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 with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- High tensile strength of 70,000 psi ensures secure, durable fastening in demanding industrial applications.
- Rockwell B80 hardness provides excellent wear resistance and maintains thread integrity under stress.
- Integrated flange design eliminates the need for a separate washer, distributing load evenly and speeding up assembly.
- UNC coarse threading with Class 2A fit offers easy, quick installation and reliable engagement in a variety of materials.
- External hex drive allows for high-torque application with standard tools, reducing installation time and effort.
- Full threading along the 5/8" length ensures maximum grip and adjustability in assembled components.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these 18-8 stainless steel hex flange screws address common challenges such as vibration loosening and corrosion-induced failure. The flanged head provides a larger bearing surface, reducing surface pressure and preventing damage to softer materials, while the UNC coarse thread with Class 2A fit ensures rapid assembly and reliable performance in dynamic environments. Made from corrosion-resistant 18-8 stainless steel, these screws are ideal for machinery, automotive, and construction uses where exposure to moisture, chemicals, or outdoor elements is a concern. The combination of 70,000 psi tensile strength and fully threaded design guarantees a secure hold, minimizing maintenance and replacement costs over time.
Specification Summary & Compliance
This 1/4"-20 x 5/8" hex head flange screw features precise UNC coarse threads with a Class 2A thread fit for consistent, reliable fastening. It complies with ASTM F593 specifications, ensuring material and mechanical properties meet industry standards. Additionally, the screw is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free from hazardous substances and suitable for global regulatory requirements.
