S-90602A255 1/2"-20 x 1 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 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
- Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C32) provides excellent wear resistance, maintaining structural integrity under repeated loads.
- Flanged design eliminates the need for separate washers, simplifying installation and providing a larger bearing surface for enhanced stability.
- Precise Class 2A thread fit ensures smooth assembly and secure fastening, reducing the likelihood of cross-threading in fine UNF threads.
- Partial threading offers optimal grip and clamping force for specific joint requirements, improving load distribution.
- External hex drive allows for high-torque installation with standard tools, speeding up assembly in time-sensitive operations.
Professional Applications & Engineering Value
Engineered for heavy-duty applications, this Grade 8 hex head screw addresses critical challenges in machinery, construction, and automotive assemblies where vibration and dynamic loads are common. The zinc yellow-chromate plated steel construction combats rust and chemical exposure, prolonging fastener life in outdoor or corrosive settings. Its UNF fine thread and Class 2A fit provide superior resistance to loosening, ensuring stable connections in precision equipment. The flanged feature distributes pressure evenly, preventing surface damage and enhancing joint integrity. Ideal for bolting high-stress components, this screw delivers consistent performance under 150,000 PSI tensile strength, meeting rigorous industrial demands.
Specification Summary & Compliance
This screw adheres to IFI 111 / SAE J429 specifications, with a Class 2A thread fit for precise dimensional accuracy in UNF fine threading. It is manufactured from high-strength steel with a zinc yellow-chromate plating for durability and meets standard industry requirements for Grade 8 fasteners, including hardness and tensile benchmarks. Compliant with common industrial regulations, it ensures reliability in professional applications.
