S-92316A593 5/16"-18 x 2 1/4" 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black phosphate steel coating extends service life in harsh industrial environments.
- High hardness rating of Rockwell C32 provides excellent wear resistance and durability under repetitive loads.
- Flanged head design eliminates the need for separate washers, simplifying installation and distributing load more effectively.
- Class 2A thread fit with UNC coarse spacing allows for easier assembly and better vibration resistance in demanding conditions.
- Partially threaded shank offers improved clamping force and prevents loosening in dynamic applications.
- Compliance with SAE J429, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for global use.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery assembly, construction, and automotive sectors. The black phosphate steel material provides a robust barrier against rust and corrosion, essential for outdoor or high-moisture environments. Its UNC coarse thread and Class 2A fit facilitate quick, secure fastening even in vibrating equipment, reducing maintenance downtime. The partially threaded design ensures precise clamping without over-tightening, making it ideal for structural connections where high tensile strength and longevity are paramount. This screw delivers consistent performance in industrial fastening scenarios, from heavy machinery to infrastructure projects.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 2A thread fit and coarse spacing for reliable engagement. It meets SAE J429 specifications for Grade 8 fasteners, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, it is free from hazardous substances, supporting safe and sustainable industrial use.
